Gerson Fauth

Universidade do Vale do Rio dos Sinos | UNISINOS · Instituto Tecnológico em Micropaleontologia (ITT FOSSIL)

Multi‐scale transgressive‐regressive cycles from the mid‐Jurassic were recognised in the Central Lusitanian Basin, Portugal. These cycles allow the depositional evolution of the basin to be better understood and aid in the construction of stratigraphic sequences composed of three hierarchies. The stacking pattern of high‐frequency transgressive‐reg...

Short-lived (104–105 years) carbon isotope excursions (CIEs), many of which are associated with some degree of ocean warming, are a feature of the warm climates of the early Paleogene. Here we present new calcareous nannofossil and geochemical data through the first of these Paleogene carbon cycle perturbations, known as the DAN-C2 event (65.8–65.7...

Though primarily a recent genus, Conchoecia Dana 1853 has had a number of Cretaceous forms dubiously attributed to it since the description of Conchoecia cretacea Pokorný, 1964. Recently, most of these species were reassigned to the genus Neorichterina Tóth and Cséfán, 2018, considered a Cretaceous representative of Family Entomozoidae. However, th...

Este trabalho registra os primeiros braquiais e taças de roveacrinídeos isolados da matriz rochosa no Hemisfério Sul.

Antarctica is one of the most vulnerable regions to climate change on Earth and studying the past and present responses of this polar marine ecosystem to environmental change is a matter of urgency. Sedimentary ancient DNA (sedaDNA) analysis can provide such insights into past ecosystem-wide changes. Here we present authenticated (through extensive...

Lake and lagoon sediments are important recorders of the Earth's magnetic field variations. However, the Southern Hemisphere, particularly the South American continent, contributes only a small fraction of the global paleosecular variation (PSV) and relative paleointensity data, which hinders a better understanding of the global PSV. Moreover, the...

Carbon cycle perturbations dramatically affected the ocean-climate system during the Aptian-Albian transition. However, the chronology of this interval is still intensively debated. Here we present a comprehensive astronomical calibration of planktonic foraminiferal and calcareous nannofossil bioevents along a complete marine sedimentary succession...

Early Pleistocene Marine Isotope Stage (MIS)‐31 (1.081–1.062 Ma) is a unique interval of extreme global warming, including evidence of a West Antarctic Ice Sheet (WAIS) collapse. Here we present a new 1,000‐year resolution, spanning 1.110–1.030 Ma, diatom‐based reconstruction of primary productivity, relative sea surface temperature changes, sea‐ic...

Calcareous nannofossil distribution, environmental magnetism, and geochemical data provide stratigraphic evidence concerning the paleoceanographic changes across the lower/middle Albian and the Oceanic Anoxic Event 1b (OAE1b, Kilian Level) at South Atlantic Ocean. In this study, we analyzed samples from the sedimentary records at Deep Sea Drilling...

Ice loss in the Southern Hemisphere has been greatest over the past 30 years in West Antarctica. The high sensitivity of this region to climate change has motivated geologists to examine marine sedimentary records for evidence of past episodes of West Antarctic Ice Sheet (WAIS) instability. Sediments accumulating in the Scotia Sea are useful to exa...

This paper presents the first study of nonmarine ostracods recovered from the Danian of the upper Yacoraite Formation (Balbuena IV sequence) Salta Basin. Six species were identified: Ilyocypris triebeli, Ilyocypris argentiniensis, Neuquenocypris (Alleniella)? sp. 1; Neuquenocypris (Alleniella)? sp. 2; Penthesilenula sp. and four indeterminate speci...

This study reports a set of primeval marine incursions identified in the two drill cores (1PS-06-CE and 1PS-10-CE) recovering the Barbalha Formation, Araripe Basin, Brazil. Based on multi-proxy approach involving stratigraphy, microbiofacies, ichnofossils, and microfossils found in the Barbalha Formation, three short-lived marine incursions were id...

Early Cretaceous sedimentary basins on the South Atlantic continental margins of South America and Africa are closely related with the Gondwana break-up, and record coeval paleoceanographic, paleoclimatic, and biotic changes during the late Barremian–Albian. The Sergipe-Alagoas Basin of northeastern Brazil contains one of the most complete Lower Cr...

The Southern Ocean paleoceanography provides key insights into how iron fertilization and oceanic productivity developed through Pleistocene ice-ages and their role in influencing the carbon cycle. We report a high-resolution record of dust deposition and ocean productivity for the Antarctic Zone, close to the main dust source, Patagonia. Our deep-...

The eastern Scotia Sea is known as Iceberg Alley, where large numbers of icebergs are brought to the Antarctic Circumpolar Current via the Weddell Sea Gyre. Icebergs transported through Iceberg Alley today can have traveled in the coastal current from anywhere around the Antarctica margin, but are sourced mostly from the Weddell Sea sector. The Wed...

The timing of continental-scale marine flooding events in Western Amazonia during the Neogene is still an unsolved question. Despite broad proxy-based evidence of such events, the pathways and duration of late Miocene marine incursions remain controversial. We provide coupled calcareous and organic microfossil and geochemical data from six onshore...

This paper presents the results of a paleoenvironmental study of two Hauterivian–Aptian adjacent sections (Transnordestina A/B) of the Iguatu Basin using ostracods and aided by X-ray fluorescence (XRF), total organic carbon (TOC), total sulfur (S), and spectral analyses. Cluster analysis divided the 10 genera found into two main groups: one compose...

The Southern Ocean paleoceanography provides key insights into how iron fertilization and oceanic productivity developed through Pleistocene ice-ages and their role in influencing the carbon cycle. We report the first high-resolution record of dust deposition and ocean productivity for the Antarctic Zone, close to the main dust source, Patagonia. O...

The Santa Marta Formation (James Ross Island, Antarctica) presents one of the most complete Santonian-Campanian high-latitude marine records in the Southern Hemisphere. Recent micropaleontological studies pointed to an unusual preferential preservation of calcareous microfossils, such as foraminifera and nannofossils, in tuffaceous sandstone levels...

The long-standing view on the Cretaceous climate zones suggests the inception of an Equatorial Humid Belt (EHB) in the Albian. This inception contrasts with recent sedimentological and palynological evidence of sustained low-latitude, wetter paleoenvironment in the South American and African landmasses during the Aptian. The trigger for this early-...

The Cretaceous-Paleogene (K-Pg) boundary extinction event affected planktic foraminiferal assemblages worldwide in a dramatic way, but deep sea benthic foraminiferal assemblages were not significantly impacted. However, possible impacts of massive early Danian volcanic eruptions, such as those related to the Deccan Traps, on benthic foraminiferal a...

Southern Ocean paleoceanography provides key insights into how iron fertilization and oceanic productivity developed through Pleistocene ice-ages and their role in influencing the carbon cycle. We report the first high-resolution record of dust deposition and ocean productivity for the Antarctic Zone, close to the main dust source, Patagonia. Our d...

The end-Cretaceous impact is marked by a dramatic decline in marine diversity. The recovery and export of primary production are still debated and have distinct responses according to local and global factors. The purpose of this study is to understand primary production based on calcareous nannofossil assemblages and geochemical data in the early...

The tectonic evolution of the Equatorial Atlantic Gateway (EAG) throughout the early Cretaceous had global implications. This break-up of western Gondwana has played a significant role in causing, or amplifying, environmental changes due to its influence on ocean chemistry, nutrient distribution, water mass circulation, and bottom waters ventilatio...

International Ocean Discovery Program (IODP) Site U1536 (proposed Site SCO-13) is located 235 km northwest of the South Orkney Islands at 59°26.46′S, 41°3.66′W in 3220 m of water. Site U1536 is the first of two sites drilled in Dove Basin, which is located in the southern Scotia Sea. This site was targeted to recover a com- plete Neogene record of...

International Ocean Discovery Program (IODP) Site U1535 (proposed Site SFSD-02A) is located on the northern flank of a large trough ~668 km east of the Strait of Magellan at 53°11.49′S, 58°38.60′W in 647 m of water. The site is situated at Common Depth Point 9220 on Seismic Reflection Profile SGFI93-107. Site U1535 is the second of a pair of sites....

This section provides an overview of operations, depth conven- tions, core handling, curatorial procedures, and analyses performed on the R/V JOIDES Resolution during International Ocean Discov- ery Program (IODP) Expedition 382. This information applies only to shipboard work described in the Expedition reports section of the Expedition 382 Procee...

International Ocean Discovery Program Expedition 382, Iceberg Alley and Subantarctic Ice and Ocean Dynamics, investigated the long-term climate history of Antarctica, seeking to understand how polar ice sheets responded to changes in insolation and atmospheric CO2 in the past and how ice sheet evolution influenced global sea level and vice versa. F...

International Ocean Drilling Program (IODP) Site U1538 (pro- posed Site SCO-11) is located 365 km north-northeast of the South Orkney Islands at 57°26.52′S, 43°21.47′W in 3131 m of water. The site lies in Pirie Basin and is situated at Shotpoint 4900 on Seismic Reflection Profile SCAN2013-13, 9 km east of Crossing Line SCAN2013-11. Site U1538 is lo...

International Ocean Discovery Program (IODP) Site U1534 (proposed Site SFSD-03A) is located at 53°11.38′S, 58°45.65′W in 605 m of water. The site is situated on the northern flank of an east– west trending trough on the continental shelf ~660 km east of the Strait of Magellan at Common Depth Point 10005 on Seismic Re- flection Profile SGFI93. Site...

International Ocean Discovery Program Expedition 382, Ice- berg Alley and Subantarctic Ice and Ocean Dynamics, investigated the long-term climate history of Antarctica, seeking to understand how polar ice sheets responded to changes in insolation and atmo- spheric CO2 in the past and how ice sheet evolution influenced global sea level and vice vers...

International Ocean Drilling Program (IODP) Site U1537 (pro- posed Site SCO-18) is located 265 km northwest of the South Or- kney Islands at 59°6.65′S, 40°54.37′W in 3713 m of water. The site lies in the northeast part of Dove Basin in a ~1 km thick contourite drift and is situated at Shotpoint 4900 on Multichannel Seismic (MCS) Reflection Profile...

The Aptian–Albian interval is characterized by significant paleoclimatic, paleoceanographic, and paleogeographic changes, which in turn affected the distribution and evolution of marine ecosystems. Despite the importance of such studies, there have been few correlations between Aptian–Albian sections of the Tethys Sea and those of the South Atlanti...

International Ocean Discovery Program (IODP) Expedition 382 in the Scotia Sea’s Iceberg Alley recovered among the most continuous and highest resolution stratigraphic records in the Southern Ocean near Antarctica spanning the last 3.3 Myr. Sites drilled in Dove Basin (U1536/U1537) have well‐resolved magnetostratigraphy and a strong imprint of orbit...

This paper presents new taxonomic reports and biostratigraphic inferences based on ostracods in the basal section of the cored well UFRJ-2-LRJ-01-SE, perforated in the Votorantim quarry, Sergipe-Alagoas Basin, Brazil. The studied material comprised 44 samples in the range 438.65 to 315.30 m, identifying 52 species of ostracods distributed in 31 gen...

We investigate changes in calcareous nannofossil and ostracod communities, which reflect surface and bottom water conditions, respectively, across the Cretaceous-Paleogene transition (K-Pg) at the Cerro Azul Section, Jagüel Formation, Neuquén Basin, Argentina. The K-Pg transition at the Cerro Azul Section is characterized by calcareous nannofossil...

Micropaleontology is crucial branch of Earth Sciences, with a pivotal role in the success of the oil and gas industry over the decades. This sector of paleontology is based on the taxonomical description of microfossils, which encompass fossils with size variation from 0.001 mm to 1 m. Normally these microorganisms have a high rate on preservation,...

Non-marine ostracods have been used for a long time to aid in the understanding of the Lower Cretaceous sedimentary deposits of Brazil, with various studies showing their value for biostratigraphic zonation in different basins. The northeastern region of Brazil contains several basins south of the Potiguar Basin which originated from the rifting th...

Iceberg alley and Sub-Antarctic zone of South Atlantic is a key modulator for the global climate. The sensitivity and the importance of this region to the climate change have been a significant topic of research with respect to past, present and future climate. The studies related to long term climate reconstructions and frontal movement during the...

Iceberg alley and Sub-Antarctic zone of South Atlantic is a key modulator for the global climate. The sensitivity and the importance of this region to the climate change have been a significant topic of research with respect to past, present and future climate. The studies related to long term climate reconstructions and frontal movement during the...

Changes in oceanic circulation and productivity patterns near Central America have been explained using numerous different tools, such as tectonics, geochemistry and micropaleontology. This paper aims to contribute to this discussion through the study of dinoflagellates and palynofacies of the drill core from DSDP Site 153. Based on foraminiferal d...

A riqueza e abundância de nanofósseis calcários em rochas e sedimentos marinhos, juntamente com sua ampla distribuição geográfica e rápida evolução, faz com que sejam amplamente utilizados em estudos bioestratigráficos e paleoceanográficos. Estes organismos sofrem influência de uma série de variáveis, como disponibilidade de luz e nutrientes, oxige...

Computational analysis applicability to paleontological images ranges from the study of the evolution of animals, plants and microorganisms to the habitat simulation of living beings from a specific epoch. It can also be applied in several niches, e.g. oil exploration, where several factors can be analyzed in order to minimize costs related to oil...

The Albian–Cenomanian was an interval of extreme warmth due to greenhouse climatic conditions, as well as significant changes in the paleogeography and paleoceanography of the oceans, which affected the evolution of marine ecosystems on a global scale. This study analyzed the calcareous nannofossil assemblages from 72 samples that were recovered fr...

Early Danian environmental perturbations related to carbon isotope negative excursions (CIEs) were recognized at Deep Sea Drilling Project (DSDP) Hole 516F, Rio Grande Rise. Within the first ~160 kyr of the Danian, environmental stability is evidenced by well‑oxygenated bottom waters, good carbonate preservation, and relatively high primary product...

Recent International Ocean Discovery Program (IODP) drilling in the Scotia Sea’s “Iceberg Alley” at Sites U1536 and U1537 recovered stratigraphic records from the late Pliocene to the Holocene and represent some of the most continuous and highest resolution records ever recovered near Antarctica. These records have excellent magnetostratigraphy and...

Micropaleontological studies conducted in the drill cores of the Deep Sea Drilling Project (DSDP) in the 70s and 80s in the South Atlantic are considered important references, especially in sites such as the São Paulo Plateau. Petroliferous activity in Brazil have been developed in deep water Cretaceous deposits, making it necessary to reinterpret...

Non-marine ostracods have been used for a long time to aid in the understanding of the Lower Cretaceous of Brazil, with various studies showing their value for biostratigraphic zonation in numerous different basins. The northeastern region of Brazil contains a number of basins located to the south of the Potiguar Basin, denominated the Northeastern...

International Ocean Discovery Program Expedition 382, Iceberg Alley and Subantarctic Ice and Ocean Dynamics, drilled five sites in Scotia Sea basin, two in intermediate water beneath the Sub-Antarctic Front and three in deep water at the southern boundary of the Antarctic Circumpolar Current within “iceberg alley”. Here, we discuss the lithostratig...

The applicability of computational analysis to paleontological images ranges from the study of the animals, plants and evolution of microorganisms to the simulation of the habitat of living beings of a given epoch. It also can be applied in several niches, such as oil exploration, where there are several factors to be analyzed in order to minimize...

Ostracods are common yet understudied prey item in the fossil record. We document drill holes in Paleocene (Danian) ostracods from central Argentina using 9025 specimens representing 66 species. While the percentage of drilled specimens at assemblage‐level is only 2.3%, considerable variation exists within species (0.3–25%), suggesting prey prefere...

In recent years, there has been an increasing interest in understanding the biostratigraphic framework and depositional environments of the Lower Cretaceous Rosablanca Formation (Middle Magdalena Basin). In order to contribute to this, a micropaleontological study was conducted in two wells that drilled strata of the Rosablanca Formation. Despite t...

Palynological studies in large basins yield the most significant results for understanding basinal and continental evolution. We selected the Solimões Basin in the upper reaches of the Amazon River as our study site due to the availability of drill cores in this jungle-covered terrain. The purpose of this paper is contribute to the palynological kn...

An overview is presented of the biostratigraphic studies with Cretaceous marine ostracods of 14 South Atlantic basins, situated both in the African and South American continental margins. The majority of South American studies were developed after the 2000s, while the African ones were published earlier. Studies on the Brazilian equatorial margin s...

RESUMO: As descobertas de hidrocarbonetos nas bacias marginais do sudeste brasileiro, aumentaram a necessidade de estudos detalhados com grupos de microfósseis para o Cretáceo Inferior do Brasil. Entre esses grupos, destacam-se os ostracodes, devido à sua grande abundância nos sedimentos no Cretáceo Inferior, bem como ao fato de serem organismos ad...

Palynological analyzes of 418 samples (cutting and core) of the well 02-ANP-05 (depth of 2859 m), São Luís Basin, were conducted. Strata of the Paleozoic (Silurian-Devonian) were recognized based on the occurrence of acritarchs, prasinophycean and chitinozoans between the depths of 2859 to 2844 m. This facies is composed primarily by quartzose sand...

This paper presents a biostratigraphic revision and a quantitative study of the calcareous nannofossils from DSDP Leg 80 – Hole 550B. A total of 42 samples were analyzed, revealing 78 species whose preservation varied from slightly to moderately dissolved with slight to severe overgrowth. Biostratigraphy indicates deposition during the late Campani...

This study presents biostratigraphic remarks based on the stratigraphic ranges of the planktonic foraminiferal species recovered from two holes drilled on the southeastern São Paulo Plateau, eastern Brazilian continental margin. Thirty samples were analyzed from the DSDP Leg 39, holes 356A (between 19,50 m and 37,50 m depth) and 356 (between 38 m a...