Results 11 to 20 of about 14,273,827 (206)

Detrital zircon geochronology and provenance of the Chubut Group in the northeast of Patagonia, Argentina

Journal of South American Earth Sciences, 2015
Abstract The Chubut Group constitutes the most widespread sedimentary unit in NE Patagonia, characterized by variable-energy fluvial deposits. U–Pb analysis of detrital zircons from two sections of the Chubut Group constraint the age of the oldest sedimentary rocks in the northeast of the Somuncura – Canadon Asfalto Basin.
Navarro, Edgardo Luis, Astini, Ricardo Alfredo, Belousova, Elena, Guler, Maria Veronica, Gehrels, George   +4 more
openaire   +3 more sources

Dinosaur remains from the Lower Cretaceous of the Chubut Group, Argentina

Cretaceous Research, 2003
Abstract Some fragmentary dinosaur remains from the uppermost Hauterivian–Barremian La Paloma Member of the Cerro Barcino Formation of northern Chubut, Argentina are described. Together with the fauna from the La Amarga Formation of Neuquen, Argentina, this material represent the oldest known Cretaceous dinosaur fauna from South America.
Oliver W.M. Rauhut, Gerardo Cladera, Patricia Vickers-Rich, Thomas H. Rich   +3 more
openaire   +2 more sources

The oldest monofenestratan pterosaur from the Queso Rallado locality (Cañadón Asfalto Formation, Toarcian) of Chubut Province, Patagonia, Argentina. [PDF]

R Soc Open Sci
As the first group of tetrapods to achieve powered flight, pterosaurs first appeared in the Late Triassic. They proliferated globally, and by the Late Jurassic through the Cretaceous, the majority of these taxa belonged to the clade Monofenestrata (which
Fernandes AE, Pol D, Rauhut OWM.
europepmc   +2 more sources

DAWSONITE IN TUFFS AND LITHARENITES OF THE CERRO CASTANO MEMBER, CERRO BARCINO FORMATION, CHUBUT GROUP (CENOMANIAN), LOS ALTARES, PATAGONIA, ARGENTINA

The Canadian Mineralogist, 2011
Dawsonite, NaAlCO 3 (OH) 2 , occurs as a replacement, cement, and fracture filling in continental, zeolitized and silicified vitric tuffs and litharenites of the Cenomanian Cerro Castano Member, Cerro Barcino Formation, Chubut Group, Patagonia, Argentina.
Zalba, Patricia Eugenia, Conconi, María Susana, Morosi, Martín Eduardo, Manassero, Marcelo, Comerio, M.   +4 more
openaire   +3 more sources

Exploring the effects of climatic and environmental heterogeneity on the spatial activity of Patagonian bats [PDF]

BMC Ecology and Evolution
Background The Patagonian region hosts endemic bat species and represents the southernmost distribution limit for several vespertilionids and molossids species. In cold temperate regions, insectivorous bats are more active during summer.
Analía Laura Giménez, Marta Gladys Grech, Óscar De Paz   +2 more
doaj   +2 more sources

First megafloristic record for the Chubut Group at Somuncurá-Cañadón Asfalto Basin: An angiosperm dominated flora from the Upper Cretaceous Puesto Manuel Arce Formation, Patagonia Argentina

Cretaceous Research, 2015
Abstract The first association of fossil plant impressions in the Chubut Group at the Somuncura-Canadon Asfalto Basin is described herein. The mid-Cretaceous megafloral assemblage from Patagonia, Argentina was recovered from the Puesto Manuel Arce Formation.
Passalia, Mauro Gabriel, Llorens, Magdalena, Páez, Manuel Antonio   +2 more
openaire   +3 more sources

Stratigraphy of the Chubut Group (Cretaceous, Golfo San Jorge Basin, Argentina): impacts of allogenic controls on the alluvial macro-architecture

Latin American Journal of Sedimentology and Basin Analysis
The Chubut Group (Cretaceous, Golfo San Jorge Basin) is a continental succession up to 6,000 meters thick, preserved in an endorheic basin. Its basal depositional system includes the fluvial Matasiete Formation and the lacustrine Pozo D-129 Formation ...
José Matildo Paredes, Nicolás Foix, José O. Allard, Sabrina Lizzoli, Sabrina X. Olazábal, Maisa A. Tunik   +5 more
doaj   +3 more sources

Association of depressive symptoms with incidence and mortality rates of COVID-19 over 2 years among healthcare workers in 20 countries: multi-country serial cross-sectional study [PDF]

BMC Medicine
Background Long-term deterioration in the mental health of healthcare workers (HCWs) has been reported during and after the COVID-19 pandemic. Determining the impact of COVID-19 incidence and mortality rates on the mental health of HCWs is essential to ...
Hiroki Asaoka, Kazuhiro Watanabe, Yuki Miyamoto, Alexandra Restrepo-Henao, Els van der Ven, Maria Francesca Moro, Lubna A. Alnasser, Olatunde Ayinde, Arin A. Balalian, Armando Basagoitia, Sol Durand-Arias, Mehmet Eskin, Eduardo Fernández-Jiménez, Freytes Frey Marcela Ines, Luis Giménez, Hans W. Hoek, Rodrigo Ezequiel Jaldo, Jutta Lindert, Humberto Maldonado, Gonzalo Martínez-Alés, Roberto Mediavilla, Clare McCormack, Javier Narvaez, Uta Ouali, Aida Barrera-Perez, Erwin Calgua-Guerra, Jorge Ramírez, Ana María Rodríguez, Dominika Seblova, Andrea Tenorio Correia da Silva, Linda Valeri, Oye Gureje, Dinarte Ballester, Mauro Giovanni Carta, Anna Isahakyan, Amira Jamoussi, Jana Seblova, Maria Teresa Solis-Soto, Ruben Alvarado, Ezra Susser, Franco Mascayano, Daisuke Nishi, HEROES group   +42 more
doaj   +2 more sources

Insight into cretaceous floras: a synthesis from plant microfossils of the Chubut Group in the Golfo San Jorge Basin

Latin American Journal of Sedimentology and Basin Analysis
This study provides a comprehensive review of the key advances in micropaleontological research of the Chubut Group in the Golfo San Jorge Basin during the twenty-first century, with a particular emphasis on the plant microfossil record of two critical ...
Andrea De Sosa Tomas, Patricia Vallati
doaj   +1 more source

Análisis composicional y procedencia de la Formación Peñas Coloradas, Grupo Río Chico (Paleoceno Superior-Eoceno?), en la región oriental de la cuenca del Golfo San Jorge, Chubut, Argentina Compositional analysis and origin of the Peñas Coloradas Formation, Río Chico Group (Late Paleocene-Eocene?), in the eastern region of the Golfo de San Jorge basin, Chubut, Argentina

Latin American Journal of Sedimentology and Basin Analysis, 2006
Se estudian preliminarmente, desde el punto de vista composicional, niveles arenosos de la Formación Peñas Coloradas (unidad inferior del Grupo Río Chico) del Paleoceno superior-Eoceno?, en los perfiles de Punta Peligro, Estancia La Rosa y Cañadón Hondo,
María Sol Raigemborn
doaj   +1 more source