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No sul do Paraná e boa parte do estado de Santa Catarina aflora uma sucessão de arenitos e ritmitos de idade eopermiana, cuja gênese está relacionada à ação de correntes de turbidez. Esses depósitos foram identificados por Salamuni e colaboradores em 1966, sendo assim os primeiros turbiditos descritos no Brasil. No entanto, esse trabalho pioneiro tem sido esquecido na literatura geológica brasileira. O intervalo turbidítico situa-se no Membro Rio Segredo da Formação Taciba, terço superior do Grupo Itararé, Bacia do Paraná. As fácies incluem desde turbiditos delgados em camadas centimétricas de arenito muito fino que grada para folhelho até camadas mais espessas, até mesmo métricas, de arenitos tabulares, frequentemente amalgamados. Estruturas de sobrecarga, marcas basais de arraste e impacto de detritos, turboglifos, aspecto dominantemente maciço, feições de escape de fluidos, estrados gradados e deformação plástica penecontemporânea formam conjunto de evidências que corrobora a atividade de fluxos gravitacionais. Além disso, a associação repousa sobre o folhelho Lontras, cujas fácies, atributos geoquímicos e conteúdo fossilífero indicam deposição em ambiente marinho restrito, de baixa oxigenação e relativamente profundo. A sucessão acima dos turbiditos registra ainda a progradação de taludes deltaicos suscetíveis a escorregamentos, que culminam com sedimentação fluvial e costeira já pertencente à Formação Rio Bonito. As relações estratigráficas permitem concluir que os turbiditos compõem um complexo com no mínimo 220 km de extensão lateral, desenvolvido durante a progradação de deltas que preencheram a bacia após seu máximo afogamento causado pela deglaciação do final do Pensilvaniano. Em subsuperfície, os arenitos turbidíticos são potenciais reservatórios para hidrocarboneto gerado em folhelhos do Devoniano da Bacia do Paraná. Podem ainda constituir bons análogos de afloramento para reservatórios turbidíticos inseridos em cunhas progradacionais de outras bacias.
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boletim
paranaense
de geociências Volume 78 (2021) 110-129
110
1
Resumo
Uma grande variedade de métodos vem sendo propostos para compreender e avaliar a suscetibilidade das vertentes ante
a ocorrência de escorregamentos translacionais, entre eles, os métodos determinísticos baseados em modelos matemá-
ticos são muito utilizados. O modelo matemático empregado nesta pesquisa teve seu foco na aplicação dos métodos
determinísticos com base na teoria do equilíbrio limite para o cálculo do Fator de Segurança (FS) e espacialização dos
resultados empregando técnicas de geoprocessamento. O uso destas técnicas é de grande importância na identicação de
áreas suscetíveis a escorregamentos, já que permitem a integração de uma grande variadade de informações da paissagem,
tais como a topograa, declividade, parâmetros físicos e mecânicos dos solos, entre outros, auxiliando na elaboração
de mapas de suscetibilidade áreas de interesse. A área de pesquisa está localizada em uma porção do Primeiro Planalto
Paranaense, ao longo da rodovia federal BR-376 entre o quilômetro 658+820 m e o quilômetro 660+690 m, onde são ob-
servadas uma grande quantidade de movimentações e cicatrizes de escorregamentos nas vertentes naturais. Várias dessas
movimentações ocorreram após eventos pluviométricos muito fortes que atingiram a região no mês de março do 2011,
com precipitações acumuladas mensal maior a 700 mm, os quais ocasionaram perjuizos e a interrupção do trafego no
trecho da BR-376. A validação do modelo empregado foi feita através do cruzamento do inventário de escorregamentos
realizado com os mapas de Fator de Segurança (FS), obtendo-se uma boa correspondencia na localização das áreas com
maior suscetibilidade ante a ocorrência de escorregamentos translacionais.
Palavras-chave: Teoria de equilibrio límite, modelos matemáticos, geoprocessamento.
Abstract
A wide variety of methods have been proposed to understand and evaluate the susceptibility of the slopes at the occur-
rence of translational landslides, including the deterministic methods based on mathematical models are widely used. The
mathematical model used in this study was its focus on the application of deterministic methods based on the equilibrium
limit theory to calculate the Factor of Safety (FS)and spatial distribution of results using geoprocessing techniques. The
use of these techniques is of great importance in identifying areas susceptible to slip, since were allow the integration
of a large variety information of landscape, such as topography, slope , physical and mechanical parameters of the soil,
among others, aiding in the drafting of susceptibility maps in places of interest. The research area is located in a portion
of the First Plateau Paranaense, along the federal highway BR-376 between kilometer 658 + 820 m and kilometer 660
+ 690 m, where they observed a lot of drives and scars of landslides on the slopes natural. Several of these movements
occurred after strong rainfall events that hit the region in March of 2011, accumulated monthly rainfall greater than 700
mm, which caused damages and stopping trafc on the stretch of the BR-376. The validation of the model used was made
by crossing inventory slip performed with Factor of Safety maps (FS), yielding a good match the location of areas with
increased susceptibility against the occurrence of slip translational.
Keywords: equilibrium limit theory, mathematical models, geoprocessing.
Mapeamento da suscetibilidade das vertentes naturais
ante a ocorrência de escorregamentos translacionais em
um trecho da BR-376, através da análise
do fator de segurança, PR
Mapping of susceptibility of natural slopes before the occurrence of translational landslides
in a stretch of the BR-376/PR, through the safety factor analysis.
YULIMAR SUGEY MILLÁN COY1, ANDRÉS MIGUEL GONZALEZ ACEVEDO1, ALBERTO PIO FIORI1
1Universidade Federal do Paraná – UFPR, Paraná – yulimarmillan@gmail.com, ori@ufpr.br, andresmgonzaleza@gmail.com
boletim paranaense
de geociências Volume 75 (2019) 1: 1-13
Os primeiros turbiditos do Brasil
The rst turbidites in Brazil
FERNADO FARIAS VESELY1, RONALDO PAULO KRAFT2, TIAGO ROSSONI MATTOS3,
DANIELLE CRISTINE BUZATTO SCHEMIKO4, FÁBIO BERTON5,
LETÍCIA BETEZEK MONTEIRO6 & HUGO SEITI YAMASSAKI7
Departamento Geologia - UFPR, Brasil, https://orcid.org/0000-0002-6741-8589, vesely@ufpr.br
2 Departamento Geologia - UFPR, Brasil, ropkraft@gmail.com
3 Departamento Geologia - UFPR, Brasil, tsottam@gmail.com
4 Departamento Geologia - UFPR, Brasil, danielleschemiko@gmail.com
5 Equinor Brasil, Brasil, fabe@equinor.com
6 Departamento Geologia - UFPR, Brasil, leticiabetezek@gmail.com
7 Departamento Geologia - UFPR, Brasil, hs.yamassaki@gmail.com
Resumo

-
boradores em 1966, sendo assim os primeiros turbiditos descritos no Brasil. No entanto, esse trabalho pioneiro tem sido

terço superior do Grupo Itararé, Bacia do Paraná. As fácies incluem desde turbiditos delgados em camadas centimétricas
-
quentemente amalgamados. Estruturas de sobrecarga, marcas basais de arraste e impacto de detritos, turboglifos, aspecto
-



-
-




Palavras-chave             

Abstract
An early Permian succession of turbidite sandstones and rhythmites is well exposed in southern Paraná and a large
area of Santa Catarina, southern Brazil. These deposits were identied by Salamuni and co-workers in 1966 and are
the rst turbidites reported in Brazil. However, this fact has been overlooked in the Brazilian geological literature.
The turbidite succession belongs to the Rio Segredo Member of the Taciba Formation, which is the upper third of the
Itararé Group, Permocarboniferous ofthe Paraná Basin. Turbidite facies include thin-bedded alternation of sandstone
and mudstone and thicker, up to m-thick tabular sandstones often amalgamated. Load structures, sole marks formed by
scouring and impact of debris, ute casts, the dominant massive aspect of sands, graded bedding, water-scape struc-
tures and penecontemporaneous plastic deformation compose a group of evidence in favor of the activity of sediment
gravity ows. Moreover, the turbidite unit rests on the Lontras shale, in which facies, geochemical parameters and
fossil content point to a relatively deep, poorly oxygenated, restricted marine environment. The succession above the
turbidites records the progradation of delta-slope sediments prone to instability and failure which, in turn, are overlain
by coastal and uvial deposits belonging to the Rio Bonito Formation. The stratigraphic relationships allow to con-
boletim
paranaense
de geociências Volume 78 (2021) 110-129
111
1
Resumo
Uma grande variedade de métodos vem sendo propostos para compreender e avaliar a suscetibilidade das vertentes ante
a ocorrência de escorregamentos translacionais, entre eles, os métodos determinísticos baseados em modelos matemá-
ticos são muito utilizados. O modelo matemático empregado nesta pesquisa teve seu foco na aplicação dos métodos
determinísticos com base na teoria do equilíbrio limite para o cálculo do Fator de Segurança (FS) e espacialização dos
resultados empregando técnicas de geoprocessamento. O uso destas técnicas é de grande importância na identicação de
áreas suscetíveis a escorregamentos, já que permitem a integração de uma grande variadade de informações da paissagem,
tais como a topograa, declividade, parâmetros físicos e mecânicos dos solos, entre outros, auxiliando na elaboração
de mapas de suscetibilidade áreas de interesse. A área de pesquisa está localizada em uma porção do Primeiro Planalto
Paranaense, ao longo da rodovia federal BR-376 entre o quilômetro 658+820 m e o quilômetro 660+690 m, onde são ob-
servadas uma grande quantidade de movimentações e cicatrizes de escorregamentos nas vertentes naturais. Várias dessas
movimentações ocorreram após eventos pluviométricos muito fortes que atingiram a região no mês de março do 2011,
com precipitações acumuladas mensal maior a 700 mm, os quais ocasionaram perjuizos e a interrupção do trafego no
trecho da BR-376. A validação do modelo empregado foi feita através do cruzamento do inventário de escorregamentos
realizado com os mapas de Fator de Segurança (FS), obtendo-se uma boa correspondencia na localização das áreas com
maior suscetibilidade ante a ocorrência de escorregamentos translacionais.
Palavras-chave: Teoria de equilibrio límite, modelos matemáticos, geoprocessamento.
Abstract
A wide variety of methods have been proposed to understand and evaluate the susceptibility of the slopes at the occur-
rence of translational landslides, including the deterministic methods based on mathematical models are widely used. The
mathematical model used in this study was its focus on the application of deterministic methods based on the equilibrium
limit theory to calculate the Factor of Safety (FS)and spatial distribution of results using geoprocessing techniques. The
use of these techniques is of great importance in identifying areas susceptible to slip, since were allow the integration
of a large variety information of landscape, such as topography, slope , physical and mechanical parameters of the soil,
among others, aiding in the drafting of susceptibility maps in places of interest. The research area is located in a portion
of the First Plateau Paranaense, along the federal highway BR-376 between kilometer 658 + 820 m and kilometer 660
+ 690 m, where they observed a lot of drives and scars of landslides on the slopes natural. Several of these movements
occurred after strong rainfall events that hit the region in March of 2011, accumulated monthly rainfall greater than 700
mm, which caused damages and stopping trafc on the stretch of the BR-376. The validation of the model used was made
by crossing inventory slip performed with Factor of Safety maps (FS), yielding a good match the location of areas with
increased susceptibility against the occurrence of slip translational.
Keywords: equilibrium limit theory, mathematical models, geoprocessing.
Mapeamento da suscetibilidade das vertentes naturais
ante a ocorrência de escorregamentos translacionais em
um trecho da BR-376, através da análise
do fator de segurança, PR
Mapping of susceptibility of natural slopes before the occurrence of translational landslides
in a stretch of the BR-376/PR, through the safety factor analysis.
YULIMAR SUGEY MILLÁN COY1, ANDRÉS MIGUEL GONZALEZ ACEVEDO1, ALBERTO PIO FIORI1
1Universidade Federal do Paraná – UFPR, Paraná – yulimarmillan@gmail.com, ori@ufpr.br, andresmgonzaleza@gmail.com
boletim paranaense
de geociências Volume 75 (2019) 1: 1-13
clude that the turbidites form a complex at least 220 km wide associated with the progradation of deltas that lled the
basin subsequent to the end-Pennsylvanian deglacial transgression. The turbidite sandstones are potential reservoirs
for Devonian, gas-prone source rocks in the subsurface and can be considered suitable outcrop analogs for turbidite
reservoirs formed within progradational wedges elsewhere.
Keywords: Turbidite complex, Itararé Group, Paraná Basin, Comissão da Carta Geológica do Paraná, deep-water
reservoirs
Vesely et al./Boletim Paranaense de Geociências 78 (2021) 110-129
112
1. Introdução
    -
leo nas bacias da margem continental brasileira e respon-
      

acumulações foram descobertas, a comunidade geocien-
      -
       
   
outros temas ligados a ambientes deposicionais de águas
profundas tornaram-se comuns, englobando estudos em
      


  

       
Brasil iniciou bem antes das primeiras descobertas de pe-
-
-

     
 
por Salamuni, Marques Filho e Sobanski em 1966. Essa

sobre turbiditos no Brasil. Porém, tal estudo pioneiro é
      
embora estudos subsequentes tenham abordado o mesmo
-
       

No momento em que o pré-sal se consolida como a

-
-
    

    

 
     

  
-

2. O que são turbiditos
Tendo em vista os frequentes debates e contradições


-
tual do tema. Contudo, está muito além do nosso objeti-
   
de turbidito e os modelos deposicionais associados. Para
        



        -

-
vitacional atuante sobre uma mistura densa de sedimento

e turbiditos preocupavam-se em compreender a origem
   graded bedding 




      
  current bedding    


      


-
umes-


-


       -
      
    -

     -

de areia sobre o leito lamoso gera gradiente inverso de
densidade, dando origem a estruturas de sobrecarga in-
cluindo load casts, estruturas em chama, ball and pillow


-
rip-up mudstone clasts  
   
ute castsgrooves

Turbiditos foram inicialmente descritos como preen-
      -

-

turbidez se desenvolva basta um gatilho ou mecanismo de

de sedimento pela gravidade. Isso é comum na presença
de declives, como nos taludes submarinos e frentes de del-

  -
      
cortam a plataforma e o talude continental e servem de

         
Nesse cenário formam-se leques submarinos ou deep-sea
fans     
turbiditos, mas com presença importante de outros tipos

-
cies oriundas do retrabalhamento por correntes de fundo.
Vesely et al./Boletim Paranaense de Geociências 78 (2021) 110-129
113
3. Contexto geológico da área estudada

Paraná realizou o primeiro programa de mapeamento ge-

produzidas diversas cartas nas escalas 1:50.000 e 1:70.000
cobrindo grande parte do leste paranaense. Os mapas, suas
-
  
     
  -


  -


no sul do Paraná e vasta porção de Santa Catarina, os
depósitos da Formação Itararé são de cunho essencialmente
subaquático... Esse condicionamento parece-nos particular-
mente importante no caso dos depósitos várvicos, os quais, ao
menos na área pesquisada, apresentam todas as característi-
cas de verdadeiros turbiditos 
-
-
   -


de correntes de turbidez contrastava com os modelos
 -

é bem aceito que grande parte do preenchimento da bacia
Figura 1


-



-

Vesely et al./Boletim Paranaense de Geociências 78 (2021) 110-129
114
      -

          

        
  -



    -



  
     -

-
    
   
-
-
  -

-
  


 
      

      

Membro Lontras. O intervalo superior é mais jovem que o
Membro Lontras e pertence, portanto, ao Membro Rio Se-



  -
      -
sentatividade regional do Membro Lontras em toda a área

4. Características dos turbiditos e fácies associadas
  -
pos: os turbiditos propriamente ditos e as fácies asso-
        
turbiditos delgados e turbiditos espessos, uma vez que os
 
-
tantes mais para sul. As fácies associadas compreendem
-
te em massa ou mass-transport deposits-

Figura 2
-



Vesely et al./Boletim Paranaense de Geociências 78 (2021) 110-129
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4.1. Turbiditos delgados
-
      -
  thin-bedded turbidites   
pares arenito-lamito apresentam espessura normalmente

-
ta descritivo, essa fácies pode ser chamada de heterolito
-

dois ou mais litotipos em divisões de espessura milimé-
trica a centimétrica.

ao longo de toda a área estudada e apresenta espessura de


onde os turbiditos espessos repousam diretamente sobre
-
-
    
    

turbiditos espessos.
O aspecto dominante é o acamamento gradacional,
        
     

      
load casts, estruturas em
    
-
  
         
groovesbounce marks
4.2. Turbiditos espessos
Compreendem as fácies em que as camadas individu-
ais têm espessura superior a 20 cm, muitas vezes métrica,

-
  
direto entre arenitos de diferentes camadas. As camadas
       
casos podem apresentar base irregular e geometrias ca-
    
Esses turbiditos arenosos formam conjuntos de camadas
  

 

  -
  
mostra que essas fácies passam a ser comuns para sul,
       

Nessa área os turbiditos espessos aparecem sobre turbidi-






fragmentos métricos e angulosos de ritmito incorporados

Localidade UTM X UTM Y Aspectos de interesse Figuras
 638955 7040019 
 7A, 8C
Barragem Norte 629889 7024158 Folhelho Lontras com lentes de calcário 10
Cachoeira
Paulista 645943 7035695 Turbiditos espessos e delgados em ciclos de compensa-
 6A
Dona Emma 631157 7014087



3, 5A,
5C, 8D

Castilhos 600019 7136915 Turbiditos delgados 4A
Pedreira Motel 620988 7100674 
 4B, 5B
Rio Benedito 647140 7054723 Turbiditos espessos 8E
 636939 7014519
Turbiditos espessos em contato erosivo sobre turbiditos


7B, 8B
Salto Grahl 631131 7006960 Turbiditos espessos com turboglifos e feições de defor-
 6B, 8A
Tabela 1
Vesely et al./Boletim Paranaense de Geociências 78 (2021) 110-129
116
Figura 3-



Vesely et al./Boletim Paranaense de Geociências 78 (2021) 110-129
117
Figura 4


Vesely et al./Boletim Paranaense de Geociências 78 (2021) 110-129
118
       
 -

    
relativamente mais espessas e mais delgadas. Consideran-


forma radial a partir do ápice do lobo deposicional, esse
-
-

        
 
batimétricos relativos criados nas áreas inter-lobos.
      
          -
       
de sola semelhantes àquelas dos turbiditos delgados.
Figura 5 

load casts

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Figura 6


de Salto Grahl.
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
  -
       
-
cundária gerada pelo escape da água dos poros, gerando
      -
     
      
-
-


4.3. Depósitos associados
    
     


      -
  

-

-




talude compreende principalmente diamictitos de matriz
      
  -
do, arenito e heterolito com diferentes intensidades de
-
sentam estruturas sedimentares preservadas, geradas por
correntes e ondas, além de restos vegetais e fragmentos
-
ginal a ambientes relativamente mais rasos. Esses sedi-


desestabilizados e movidos pela gravidade ao longo de
um talude, mediante deslizamentos e escorregamentos.
    
-

        
haviam interpretado alguns diamictitos e estratos defor-

-
delos prévios que os consideravam fácies glaciogênicas
   
esse posicionamento:
As interpretações dadas aqui diferem daquelas de Mar-
tin (1964), não obstante a concordância de resultados. As
deformações não estão diretamente ligadas à ação mecâni-
ca do gelo, mas sim a fenômenos subaquáticos, principal-
mente correntes de turbidês e deslizamentos (slumping)


-
de para cima. Inicia com folhelhos e siltitos cinzentos, bio-
turbados e por vezes carbonosos, que passam para hetero-
litos com acamamento linsen e wavy
gama variada de estruturas sedimentares produzidas por
-
swaley 
    

trunca esse conjunto e logo acima dela repousam arenitos
grossos a muito grossos, quartzo-feldspáticos e com estra-
-

5. O complexo turbidítico
 
      -
        
    
-
te profunda, da ordem de algumas centenas de metros.
      
        
dezenas de metros de espessura conforme documenta-
     
        




     
 
de várias centenas de metros se feita analogia com vales
 

       

 
     -
      
terrestres quanto aquáticos, incluindo organismos mari-

-
to, a bacia receptora dos turbiditos aqui discutidos.
     -
camente regressivo, uma vez que os turbiditos basais
     -
nando com o surgimento de ambientes parálicos forma-
 

já na metade superior do Membro Lontras, conforme
  
       -
      
       -
-
   
     
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Figura 7

   

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Figura 8ute casts
-


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-

paleocorrentes em diferentes segmentos desse trato de-
      -
-


-
-

acumulariam na parte inferior e no sopé de um talude

similar a alguns deltas proglaciais modernos da América
         
-
ra 1D, em que a transferência de sedimento é pontual e
-




de turbidez podendo ser disparadas pela ruptura do talu-
  
 
 -
  -


de turbidez. As fácies de turbiditos delgados e espessos
    
       
-
 
mais erosivas, ricas em intraclastos de folhelhos, e com
     



        -
ice-rafted debris-
gens glaciais que ainda mantinham contato com o cor-

Figura 9 
em roseta mostram dados de paleocorrentes obtidos nas diferentes associações de fácies.
Vesely et al./Boletim Paranaense de Geociências 78 (2021) 110-129
124

-
-

   
till pellets-
dump structures-

-

sul da área estudada.
  
escura a preta, presença de lentes carbonáticas e espes-

representa um horizonte de referência para correlações a
-
-


-
-
-

      

     
 
       

6. Especulações sobre o potencial petrolífero
-
        -
 
 

       
       
  -
    
      
       
 -
nham a ser descobertos.
-
        
duvidosa, embora saiba-se que os arenitos Rio Segredo
       
-

podemos, portanto, aventar que turbiditos ocorram em
      
noroeste, alcançando, inclusive, a cozinha geradora da
      
        

  

      
a porosidade média do Membro Rio Segredo em sub-
     
      -
       

-
-
ram detectados ao longo de todo o pacote arenoso.


    
 -
 
     
        
Há que se considerar, contudo, que o soterramento pode
    -

      
 
 

 
-
-
tante comuns no interior desse folhelho, fazendo com que
 -
bém uma possibilidade.
-
    -
 
-
-
 

7. Considerações sobre o uso de análogos

      -
 
      -
-






em três dimensões. Assim, as informações adquiridas em
   

 
    


várias bacias da margem continental, num ambiente tec-
tônico de margem continental passiva ou divergente, e sua



-
    
sedimentation throughout the eastern Brazilian margin.
Vesely et al./Boletim Paranaense de Geociências 78 (2021) 110-129
125


enquadram-se em duas grandes categorias quanto à forma
com que o sedimento é transferido para a bacia. O primei-
ro tipo envolve leques submarinos agradacionais e longe-

continental e funcionam como grandes condutos de pas-
ba-
sin-oor fans-

  -
dos diretamente pela linha de costa que prograda até a
-

       -
  
      shingled
turbidites presentes no interior das cunhas progradacio-

também aos turbiditos de rampa submarina de frente

invés de leques submarinos de grande porte e duradou-

  
Grupo Itararé se enquadrariam no segundo tipo, sen-
do, portanto, comparáveis com turbiditos inseridos em
cunhas progradacionais. Sistemas dessa categoria na
      
 
-



  

 
transferem areia da margem da plataforma para o sopé
        -



       -

-
-


-
-
-

sobretudo do ponto de vista dos elementos arquitetônicos,
-

Figura 10
cone-in-cone.
Vesely et al./Boletim Paranaense de Geociências 78 (2021) 110-129
126

no uso desses turbiditos como análogos, pois nas bacias
marginais há atividade de correntes de contorno a partir





Figura 11

mostra clinoformas progradacionais com turbiditos arenosos na sua parte inferior. Esses turbiditos correspondem a anomalias de ampli-

     



Vesely et al./Boletim Paranaense de Geociências 78 (2021) 110-129
127
8. Conclusões
     
primeira vez nas bacias sedimentares brasileiras por
     
do Grupo Itararé no sul do Paraná e norte de Santa
Catarina. Esse trabalho é, portanto, o marco inicial da
pesquisa em turbiditos no Brasil.


-


-
bos deposicionais instalados na parte inferior e no
sopé de um talude progradacional alimentado por

   

    
base de um grande ciclo regressivo que se ini-
     
-

Os turbiditos aqui descritos poderiam constituir

folhelhos devonianos da Bacia do Paraná, além de
    -

Agradecimentos
-
-

  

    
  -

doutorado para R.P.K., D.C.B.S. e F.B., e à Petrobras




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
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   
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    
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This paper describes facies relationships and stratigraphic architecture of early Permian deglacial deepwater to fluvio-deltaic deposits exposed in the eastern border of the Paraná Basin, southern Brazil. The studied succession is located in the Rio do Sul depocenter and comprises an upward transition between the topmost interval of the Itararé Group (Rio do Sul Formation) and the lowermost unit of the Rio Bonito Formation (Triunfo Member). Geological mapping and facies analysis allowed the recognition of the following facies associations, vertically stacked: thin and thick-bedded turbidites, hyperconcentrated and concentrated density-flow deposits (hyperpycnites), mass-transport deposits, fine-grained heterolithic beds of prodelta, delta-front, shoreface and delta-plain deposits, as well as fluvial beds resting on incised valleys. The stratigraphic analysis through the interpretation of the facies associations, stacking pattern and paleocurrent dispersal trends were enough to define the clinoform stratigraphic architecture, composing a progradational-aggradational pattern. The paleoflows for all facies associations show a main trend towards the south-southwest. In this context, hyperpycnal beds can represent a glacial source from the northeast, because of striated and faceted clasts immersed in the conglomeratic facies, whereas turbidites have been understood as the products of their dilution. Likewise, mass-transport deposits are related to the collapse of the shelf-margin delta, represented by allochthonous blocks composed of deltaic beds within the mass-flow diamictites. Thus, these mass-transport deposits do not evolve downslope to turbidity currents. This configuration was likely for building the relief of the slope system, probably a shelf-edge delta susceptible to mass failure. Paleo-ice flows towards SW recorded in the Rio do Sul Formation, genetic related to fluvio-deltaic deposits of Rio Bonito Formation, highlight the scenario of final stages of the Late Paleozoic Ice Age in the SW of Gondwana and support the previous researches which point to the presence of diachronous ice-spreading centers from paleohighs.