Article
Geosciences, Multidisciplinary
Lucas Inglez, Lucas Warren, Fernanda Quaglio, Renata G. Netto, Juliana Okubo, Maria J. Arrouy, Marcello G. Simoes, Daniel G. Poire
Summary: This study re-analyzed discoidal structures in the Cerro Negro Formation, proposing two alternative hypotheses for their origin. It was found that internal laminations and vertical tubes in the structures bear similarities to other pseudofossils, suggesting a possible origin from fluid-escape processes.
GEOLOGICAL MAGAZINE
(2022)
Review
Ecology
Federico A. Vignale, Agustina I. Lencina, Tatiana M. Stepanenko, Mariana N. Soria, Luis A. Saona, Daniel Kurth, Daniel Guzman, Jamie S. Foster, Daniel G. Poire, Patricio G. Villafane, Virginia H. Albarracin, Manuel Contreras, Maria E. Farias
Summary: The wetlands and salt flats in the Central Andes region are extreme environments influenced by volcanic activity and resembling early Earth conditions, potentially providing insights into the origin of life. Microbial communities in these environments, termed Andean Microbial Ecosystems (AMEs), show diverse biogeochemistry and microbial diversity, highlighting the importance of studying and protecting these unique habitats for scientific research.
Article
Geosciences, Multidisciplinary
Graham A. Shields, Robin A. Strachan, Susannah M. Porter, Galen P. Halverson, Francis A. Macdonald, Kenneth A. Plumb, Carlos J. de Alvarenga, Dhiraj M. Banerjee, Andrey Bekker, Wouter Bleeker, Alexander Brasier, Partha P. Chakraborty, Alan S. Collins, Kent Condie, Kaushik Das, David A. D. Evans, Richard Ernst, Anthony E. Fallick, Hartwig Frimmel, Reinhardt Fuck, Paul F. Hoffman, Balz S. Kamber, Anton B. Kuznetsov, Ross N. Mitchell, Daniel G. Poire, Simon W. Poulton, Robert Riding, Mukund Sharma, Craig Storey, Eva Stueeken, Rosalie Tostevin, Elizabeth Turner, Shuhai Xiao, Shuanhong Zhang, Ying Zhou, Maoyan Zhu
Summary: This article reviews the processes that led to the current geological timescale and proposes revisions for subdividing time before 720 million years ago. The assessment of Precambrian rock records suggests that using rock-based concepts for subdivision may require only modest deviation from current chronometric boundaries.
JOURNAL OF THE GEOLOGICAL SOCIETY
(2022)
Article
Geology
D. Moyano-Paz, S. Rozadilla, F. Agnolin, E. Vera, M. D. Coronel, A. N. Varela, A. R. Gomez-Dacal, A. M. Aranciaga-Rolando, J. D'Angelo, V. Perez-Loinaze, S. Richiano, N. Chimento, M. J. Motta, J. Sterli, M. Manabe, T. Tsuihiji, M. P. Isasi, D. G. Poire, F. E. Novas
Summary: The Chorrillo Formation deposits in southern Patagonia, Argentina, accumulated during a 'continental window' in the Late Cretaceous, with new vertebrate and plant fossils described. Analysis identified five architectural elements, separated into channelized and non-channelized units, representing a fine-grained dominated fluvial depositional system. The fossils include new taxa such as frogs, snakes, turtles, dinosaurs, and birds, shedding new light on the faunistic composition and paleobiogeography of Gondwana's high-latitude biotas.
CRETACEOUS RESEARCH
(2022)
Article
Geology
David Eric Tineo, Marcos Alejandro Comerio, Luis Hernan Vigiani, German Sebastian Kurten Moreno, Daniel Gustavo Poire
Summary: In recent decades, the interest in wetlands has grown, leading to more studies on their functions. The Miocene Yecua Formation in Bolivia provides valuable insights into the sedimentological and geochemical features of wetlands in back-arc settings. The composition and transport of sediment are influenced by tectonic processes and climate, and the long-term tropical to subtropical climate favors the development of wetlands.
JOURNAL OF SEDIMENTARY RESEARCH
(2022)
Article
Geosciences, Multidisciplinary
Lucas Verissimo Warren, Filipe Giovanini Varejao, Fernanda Quaglio, Lucas Inglez, Fernanda Buchi, Marcello Guimaraes Simoes
Summary: The influence of microbial communities on sedimentary dynamics is significant. The oldest evidence of microbially-induced sedimentary structures (MISS) in South America has been found in Brazil, indicating the interaction among flows, marine substrate, and benthic microbial communities. The vertical growth of microbial communities affects sediment cohesion and stability, increasing the potential for preserving bedforms and delicate features on bedding surfaces.
BRAZILIAN JOURNAL OF GEOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Damian Moyano-Paz, Alejandro R. Gomez-Dacal, Augusto N. Varela, Marcos Comerio, Tobias M. Munoz-Olivero, Joaquin Bucher, Sebastian Richiano, Daniel G. Poire
Summary: Wave-, tidal-, and fluvial-dominated deltas are significant hydrocarbon reservoirs globally. Detailed analysis of the sedimentation can evaluate the impact of depositional facies types, detrital composition, and diagenetic products on reservoir properties.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Multidisciplinary Sciences
Plinio Jaqueto, Ricardo I. F. Trindade, Filipe Terra-Nova, Joshua M. Feinberg, Valdir F. Novello, Nicolas M. Strikis, Peter Schroedl, Vitor Azevedo, Beck E. Strauss, Francisco W. Cruz, Hai Cheng, R. Lawrence Edwards
Summary: Speleothems can provide continuous and high-quality records of the geomagnetic field. The paleomagnetic records of a mid-to-late Holocene stalagmite from Brazil show small angular variations and relatively steady paleointensity, contrasting with the fast variations observed in younger speleothems from the same region.
NATURE COMMUNICATIONS
(2022)
Article
Geosciences, Multidisciplinary
David Eric Tineo, Damian Moyano-Paz, Augusto Nicolas Varela, Daniel Gustavo Poire
Summary: This study provides original data on the depositional conditions of the Tranquitas Formation and the role of tectonic and climate influences on these conditions. The results suggest two major intervals in the Tranquitas Formation and describe different facies associations within these intervals. Clay mineral analysis indicates long-term climate change and its effect on the deposition of the basin's distal area. The findings also allow for correlation with other formations in the Chaco foreland basin.
INTERNATIONAL JOURNAL OF EARTH SCIENCES
(2022)
Article
Geology
Damian Moyano-Paz, Manuel F. Isla, James A. MacEachern, Sebastian Richiano, Alejandro R. Gomez-Dacal, Augusto N. Varela, Daniel G. Poire
Summary: This study evaluates and discusses the potential controls on the evolution of aggradational wave-dominated deltaic successions through a sedimentological and ichnological study of the wavedominated deltaic succession in the lower part of the La Anita Formation in the Austral-Magallanes Basin (Argentina).
SEDIMENTARY GEOLOGY
(2022)
Article
Chemistry, Analytical
Danielle da Silva Francischini, Renata Stabile Amais, Nicolas Misailidis Strikis, Marco Aurelio Zezzi Arruda
Summary: The LA-ICP-MS technique is versatile for multielemental analysis and imaging. This study optimized the LA parameters for direct analysis of speleothem samples, and found that laser intensity, frequency, and spot diameter have significant impacts on the analysis results. The optimal parameters were determined as 90% laser ablation intensity, 20 Hz repetition rate, and 100 um spot diameter.
BRAZILIAN JOURNAL OF ANALYTICAL CHEMISTRY
(2023)
Article
Geography, Physical
Filipe G. Varejao, Lucas Warren, Luciano Alessandretti, Mariza G. Rodrigues, Claudio Ricomini, Mario Assine, Leonardo F. Cury, Frederico M. Faleiros, Marcello G. Simoes
Summary: A large number of siliceous mounds in the upper part of the Permian Teresina Formation in the Paraná Basin, Brazil are identified as hot springs. These mounds show remarkable features indicating a hydrothermal origin. The study provides important insights into the formation of syn-depositional hydrothermally precipitated silica in ancient sedimentary basins.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Lucia E. Gomez-Peral, M. Julia Arrouy, M. Sol Raigemborn, Camila Ferreyra, Victoria Penzo, Alcides N. Sial, Daniel G. Poire
Summary: The sedimentary infill of the Tandilia Basin underwent four different stages of deposition during the Neoproterozoic, two of which are visible in the Sierras Bayas Group and two in the La Providencia Group. The Villa Monica Formation represents the initial stage of basin infill and consists of a lower siliciclastic section transitioning into an upper dolostone section. The dolostone platform contains Cryogenian stromatolites and exhibits two distinct karst events.
INTERNATIONAL JOURNAL OF EARTH SCIENCES
(2023)
Article
Geosciences, Multidisciplinary
J. W. L. Afonso, P. Franceschinis, A. E. Rapalini, M. J. Arrouy, L. Gomez-Peral, D. Poire, S. Caetano-Filho, R. I. F. Trindade
Summary: This study presents a magnetostratigraphy coupled with a carbon isotope study in the Ediacaran Avellaneda Formation, which reveals a correlation between magnetic polarity pattern and carbon isotope changes associated with the Shuram excursion. The findings show the potential use of magnetostratigraphy for Precambrian stratigraphic correlation and shed further light on Ediacaran succession correlations.
PRECAMBRIAN RESEARCH
(2023)
Article
Evolutionary Biology
Sofia Ines Quinones, Francisco Cuadrelli, Martin de los Reyes, Carlos Alberto Luna, Daniel Gustavo Poire, Alfredo Eduardo Zurita
Summary: This article presents the evolutionary history and taxonomic studies of South American glyptodonts, particularly the "Plohophorini" tribe. The analysis of fossil records reveals an increase in body mass throughout the evolutionary history of glyptodonts, with complete disappearance during the Pleistocene.
JOURNAL OF SYSTEMATIC PALAEONTOLOGY
(2023)
