Eduardo M. Morel

Eduardo M. Morel
Universidad Nacional de La Plata | UNLP · Museo de La Plata

PhD

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89
Publications
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Publications

Publications (89)
Conference Paper
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The Triassic sedimentary rocks outcropping in the Cacheuta Hill (Precordillera, Mendoza province, Argentina) correspond to the upper part of the UspallataGroup (Late Triassic) comprising the younger levels of Potrerillos Formation, and the Cacheuta and Río Blanco formations. In this contribution, new fossil plant records in the Uspallata Group are...
Article
In this contribution we describe new elements of the paleoflora of Nestares Formation in its type section, exposed along both banks of the Limay River, close to the Alicurá dam (southern margin of Neuquen Basin). Samples were collected from fossiliferous level AL 18 corresponding to black shales and mudstones, interpreted as overflow events from ma...
Article
Full-text available
A new species of Osmundopsis Harris is described based on several impression-compression fossils from the upper section of the Potrerillos Formation (Uspallata Group) at Cerro Cacheuta Hill, Mendoza Province, Argentina. Osmundopsis zunigai sp. nov. is characterized by having fertile pinnae with a slender striate rachis, bearing widely separate, opp...
Article
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Dipterid ferns possess robust fossil record from Mesozoic times on, and they are considered to be a reliable indicator of warm to subtropical humid or seasonal paleoclimatic conditions. In this contribution, we revised and described new samples of fossil Dipteridaceae, from the Barreal and Cortaderita formations (Sorocayense Group), Middle Triassic...
Article
Plant phytolith production and their incorporation into soil assemblages has been studied by diverse authors in different regions of the world, mainly in the Northern Hemisphere and Africa. However, these types of studies are scarce in native plant communities from South America, especially in non-grass communities. The comprehension of the relatio...
Chapter
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In this contribution we describe fossil plant remains from Río Seco de los Castaños Formation, at San Rafael Block , Mendoza Province, Argentina. The fossil plants comprise non-forked and forked axes without or with delicate lateral expansions, which are assigned to Bowerophylloides cf. mendozaensis and Hostinella sp. We refer them to primitive lan...
Poster
Full-text available
Fossil wodds from three localities (Rincón del Águila, Paraje los Molles and Cerro Lotena) were recovered and allowed anatomic and systematic studies.
Article
In the late 1960s, rests of a low-diversity flora dominated by the lycopsid Pleuromeia were reported. The specimens were recovered from a creek near San Rafael, Mendoza Province, western Argentina, in the lower section of the Puesto Viejo Group, the Quebrada de los Fósiles Formation, considered as Early Triassic in age. Despite the importance of th...
Conference Paper
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Se da a conocer el primer registro de xiloflora correspondiente al género Tranquiloxylon (Clase Gymnospermopsida; Familia Corystospermaceae) para la Formación El Alcázar, que integra los depósitos septentrionales de la Cuenca Cuyana correspondientes al Triásico medio y es portadora de una asociación paleoflorística que abarca, desde impresiones-com...
Article
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Se da a conocer un evento catastrófico de origen volcaniclástico para el depocentro Agua de Los Pajaritos-El Alcázar, Cuenca Cuyana, San Juan, Argentina. Este evento se registró en la sección Inferior de la Formación El Alcázar y afectó de manera directa a un bosque cercano al foco eruptivo generando el arranque, ruptura y carbonización de los tron...
Article
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Se estudian las plantas fósiles preservadas como impresiones-compresiones en la Formación Carrizal (Triásico), depocentro de Marayes, San Juan, Argentina. Los taxones identificados corresponden a Equisetales (Equisetites fertilis (Frenguelli) Frenguelli, Neocalamites carrerrei (Zeiller) Halle), Osmundales (Cladophlebis kurtzi Frenguelli, C. mesozoi...
Article
Full-text available
VOLTZIALES AND PINALES (= CONIFERALES) FROM CORTADERITA FORMATION (MIDDLE TRIASSIC), ARGENTINA, AND THEIR IMPLICATION IN THE RECONSTRUCTION OF TRIASSIC CONIFERS. In this work, fossil wood, leaves, and branches designated to the subclass Pinidae (Voltziales and Pinales) are described from Cortaderita Formation (Middle Triassic). Fossil materials wer...
Article
Globular phytoliths have been mainly assigned to palms, woody trees, and other monocotyledon families from tropical regions. The lack of detailed descriptions of this phytolith morphology and its correct assignments to particular groups could lead to erroneous interpretations of phytolith records. In order to improve paleobotanical interpretations...
Article
Full-text available
In this contribution, we studied the fossil plants preserved as impressions-compressions from Carrizal Formation (Triassic), Marayes depocenter, San Juan, Argentina. The recognized taxa correspond to Equisetales (Equisetites fertilis (Frenguelli) Frenguelli, Neocalamites carrerrei (Zeiller) Halle), Osmundales (Cladophlebis kurtzi Frenguelli, C. mes...
Article
This research focuses on the three-dimensional reconstruction of an in situ forest based on fossil wood assemblages recovered in the Rancahué Formation (Upper Oligocene), Neuquén, Argentina. Atherospermataceae, Lauraceae, Nothofagaceae, Eucryphiaceae, Cunoniaceae and Myrtaceae specimens are described. The mapping of a forest floor section and in si...
Article
Full-text available
In this contribution the paleoflora of the Nestares Formation, exposed along both banks of the Limay River, close to the Alicurá dam (northwest of the Northpatagonian Massif) was reviewed. A sedimentological profile was measured, four fossil-bearing levels were identified and the systematic study allowed the identification of 18 taxa, 12 of which w...
Article
Full-text available
Abstract. REVIEW OF THE PALEOFLORA OF THE NESTARES FORMATION (EARLY JURASSIC), NEUQUÉN AND RÍO NEGRO PROVINCES, ARGENTINA. In this contribution the paleoflora of the Nestares Formation, exposed along both banks of the Limay River, close to the Alicurá dam (northwest of the Northpatagonian Massif ) was reviewed. A sedimentological profile was measur...
Article
Full-text available
Resumen. En el Cerro Cacheuta (noroeste de la provincia de Mendoza, Argentina) se relevaron cuatro perfiles de detalle, y en las localidades de Puesto Míguez y Agua de las Avispas se reconocieron siete estratos con plantas fósiles. En este aporte se presenta el estudio sistemático de las plantas fósiles encontradas y se analizan los taxones corresp...
Article
In this review, Patagonian phytogeographical patterns are analysed from a global and evolutionary perspective that takes into account aspects from the geology, climatology and plant evolution. The biomes contained within the different climatic belts are inferred through time for the southwestern Gondwana supercontinent on the basis of palaeogeograp...
Article
Full-text available
Resumen: Se efectúa el análisis sedimentológico de la Formación Carrizal (Triásico) del Depocentro de Marayes - El Carrizal, ubicado en el sector oriental de la provincia de San Juan. Sobre la base de muy contrastantes características faciales y arquitecturales, la Formación Carrizal es dividida en dos miembros: Arroyo Seco y Rickard. El Miembro Ar...
Chapter
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cias del Neuquén y Río Negro. En la provincia citada en primer término (Fig. 1, 1) las secciones con restos vegeta-les corresponden a la Localidad tipo (Paso Flores), Caña-dón y Lomas de Ranquel Huao y al Cañadón de Pancho (Frenguelli 1948; Morel et al. 1992; Artabe et al. 1994; Ganuza et al. 1995 y Morel et al. 2000). La primera referencia de esta...
Article
Full-text available
The Carrizal Formation is one of the Triassic units of the Marayes - El Carrizal rift located in the eastern San Juan Province, Argentina (Figs. 1, 2). The facies analysis and the architectural study of the Carrizal Formation (Table 1) allowed recognising two facies associations. Facies association 1 corresponds to the Arroyo Seco Member (Fig. 3),...
Article
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At its type locality, the Piedra del Águila Formation is a 71.6 m thick homoclinal succession that lies on a weathering palaeosurface developed on the igneous-metamorphic basement (Mamil Choique Formation), and is unconformably covered by the Lower Jurassic volcanic and volcaniclastic Sañicó Formation. The sedimentary succession of the Piedra del Á...
Article
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Abstract. THE TRIASSIC PALEOFLORA OF CERRO CACHEUTA, MENDOZA PROVINCE, ARGENTINA. BRYOPSIDA, LYCOPSIDA, SPHENOPSIDA, FILICOPSIDA AND GYMNOSPERMOPSIDA (CORYSTOSPERMALES AND PELTASPERMALES). Four stratigraphic logs were measured in detail at the Cacheuta hill (northwestern Mendoza Province, Argentina), and seven plantiferous levels were determined at...
Article
Four stratigraphic logs were measured in detail at the Cacheuta hill (northwestern Mendoza Province, Argentina), and seven plantiferous levels were determined at Puesto Míguez and Agua de las Avispas. The systematic study of the paleoflora found in these localities is presented in this paper. Bryopsida, Lycopsida, Sphenopsida, Filicopsida and Gymno...
Article
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Plant assemblages are described from the Talacasto and Punta Negra Formations, San Juan Province, the Argentine Precordillera. A detailed facies study involving trace fossil assemblages indicates that the plants were buried in shallow low-to high-energy marine environ- ments, but not in turbidites as previously postulated. Apart from a single speci...
Article
Full-text available
Specimens collected recently from the Las Carmelitas facies of the Kirusillas Formation exposed in the Cochabamba area, Bolivia and dated as Ludlow (Late Silurian) by graptolites, show bedding surfaces almost completely covered by coalified compressions and impressions. The majority comprise mixtures of fragmented amorphous, unidentifiable material...
Article
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The detailed stratigraphic measurements of the siliciclastic deposits belonging to the Montaña Formation (Triassic) have been raised at Santa Clara area (Mendoza Province, Argentina;. During seai-mentological logging, five fossiliferous levels were recognized. Based on the sedimentological log, the main fades attributes and succession were characte...
Article
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Abundant but fragmentary plant fossils are described from two locations in shallow water marine facies of the Lipeón (previously Kirusilla) Formation of southern Bolivia. Field relationships and limited palaeontological data suggest that the rocks are of Ludlow to possibly early P'ídolí age (i.e. late Silurian). The majority of the fossils are ster...
Article
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At the Bayo and Cocodrilo Hills (Potrerillos, northwestern Mendoza Province, Argentina) two stratigraphic logs were measured in detail and 16 plantiferous levels were determined. In this contribution the systematic study of the paleoflora is presented. The 23 taxa recognized belong to Sphenopsida (Equisetales), Filicopsida (Filicales) and Gymnosper...
Article
Full-text available
Three detailed stratigraphic logs form the siliciclastic deposits belonging to the El Freno Formation (Sinemurian) have been measured at Las Chilcas Hill and at El Cholo Anticline (upper reaches of the Atuel River Valley, Andean Cordillera of Mendoza, Argentina). The El Freno Formation is composed of clast-supported conglomerates, gravelly sandston...
Article
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Abstract. CONTRIBUTION TO THE SEDIMENTOLOGICAL AND PALAEOBOTANICAL KNOWLEDGE OF THE EL FRENO FORMATION (EARLY JURASSIC) IN THE UPPER ATUEL RIVER VALLEY, MENDOZA, ARGENTINA. Three detailed stratigraphic logs form the siliciclastic deposits belonging to the El Freno Formation (Sinemurian) have been measured at Las Chilcas Hill and at El Cholo Anticli...
Conference Paper
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The San Rafael or Sierra Pintada Block is situated at the central-western of the Mendoza province and shows diverse igneous, metamorphic and sedimentary units of Mesoproterozoic to Paleozoic age, known generally as 'pre-Carboniferous' due to they are clearly separated by a regional unconformity. One of these units is the Río Seco de los Castaños Fo...
Article
A palaeoecological study of a standing Late Triassic forest containing 150 silicified stumps from the Río Blanco Formation of Mendoza province, Argentina is described. A mapped portion of the forest floor provides quantitative data — tree density, mean separation of trees and basal area per stump — which, along with taxonomic and sedimentologic inf...
Article
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Las floras triásicas de la Argentina
Conference Paper
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Dentro del denominado " pre-Carbonífero " del Bloque de San Rafael, Mendoza, se encuentra la Formación Río Seco de los Castaños (RSC) que fuera instituída por González Díaz (1972, 1981) separándola de la Formación La Horqueta (Dessanti, 1956). Fue asignada tentativamente al Devónico por la presencia de un coral (Pleurodyctium) hallado por Di Persia...
Conference Paper
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Se trata de improntas de delicados tallos, el mayor de los cuales tiene 11,5 mm de largo y 0,57 mm de ancho. Se disponen de manera helicoidal enaciones de 5 mm de largo, probablemente dicotomizadas en el ápice. La base de las mismas es ensanchada de forma subcircular a elipsoidal, el eje mayor mide 1,1 mm, disponiéndose el mismo paralelo al eje may...
Article
Full-text available
New exposures of the classic Triassic localities of cerro Bayo and cerro Cocodrilo (Potrerillos, northwestern Mendoza province, Argentina) allowed to: (1) describe the stratigraphic architecture of the Río Mendoza, Cerro de Las Cabras, Potrerillos and Cacheuta formations; and (2) to improve the biostratigraphic knowledge of the Triassic succession...
Article
Full-text available
New exposures of the classic Triassic localities of cerro Bayo and cerro Cocodrilo (Potrerillos, northwestern Mendoza province, Argentina) allowed to: (1) describe the stratigraphic architecture of the Rio Mendoza, Cerro de Las Cabras, Potrerillos and Cacheuta formations; and (2) to improve the biostratigraphic knowledge of the Triassic succession...
Article
At Cerro La Brea, on the southern margin of Atuel river, Mendoza province, El Freno Formation is made up of more than 300 metres of siliciclastic sediments conforming an asymmetrical anticline. During data gathering of a detailed profile the existence of five plantiferous levels was determined; one of them corresponding to that identified by Ugarte...
Article
Full-text available
Abstract. THE PALEOFLORA OF CERRO LA BREA (EARLY JURASSIC), MENDOZA PROVINCE, ARGENTINA. At Cerro La Brea locality, on the southern margin of Atuel river, Mendoza province, El Freno Formation is made up of more than 300 metres of siliciclastic sediments conforming an asymmetrical anticline. During data gathering of a detailed profile the existence...
Article
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The Triassic distribution of plants in Gondwanaland is analyzed and the major biogeographic units - realm, areas and provinces- are defined using a taxonomic criterion. The Triassic Gondwana Realm with the "Dicroidium Flora" is characterized by Corystospermaceae and typical endemic genera; the endemism also appear in pan-global genera with species...
Article
A synergistic model based on reciprocal influences between biotic and abiotic factors is developed for the Triassic of southwestern Gondwana. Changes in physical environment exerted a strong influence on the characteristics and evolution of plant assemblages. The Permian-Triassic extinction, and the change from palaeophytic to mesophytic floras, is...
Article
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Study of the Triassic floristic record of several stratigraphic units of southern and west‐central Argentina has permitted recognition of five Assemblage Biozones and three Stages, defined on the basis of Assemblage Biozone chronology, analysis of main stratigraphic unconformities, and evolution of basin infill. These stages are each characterised...
Article
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Introducción La diferenciación de regiones florísticas con floras relativamente uniformes en lugares determinados de la geósfera se relaciona con las historias evolutivas de los grupos a través del tiempo geológico, y es el resultado del desarrollo espacio-temporal de diferen -tes estirpes de taxones. En este sentido, la distribu -ción paleofitogeo...
Article
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Fossil plants are described from the upper part of the Devonian Lolén Formation, Sierra de la Ventana, Buenos Aires Province, Argentina, in the area of Estancia Las Acacias. The sequence is composed mainly of dark grey shales, and fossils were found in a single horizon where thin interlayered beds of fine reddish-brown micaceous sandstones appear w...
Article
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Plant assemblages are described from two localities, San Isidro Creek and Vaqueria, in the marine basal Devonian Villavicencio Formation in Mendoza Province, the Argentine Precordillera. Abundant smooth and more rarely axes with enations occur with rare fertile specimens and isolated swollen structures interpreted as sporangia. Sterile ‘leafy’ axes...