A5079976755- Geology and Paleoclimatology Research
- Plant Diversity and Evolution
- Geological and Geochemical Analysis
- Paleontology and Stratigraphy of Fossils
- Evolution and Paleontology Studies
- Geological and Geophysical Studies Worldwide
- Geological formations and processes
- Plant and Fungal Species Descriptions
- Geological and Tectonic Studies in Latin America
- Paleontology and Evolutionary Biology
- Fish biology, ecology, and behavior
- Bat Biology and Ecology Studies
- Geomagnetism and Paleomagnetism Studies
- Botanical Research and Applications
- earthquake and tectonic studies
Consejo Nacional de Investigaciones Científicas y Técnicas
2019-2023
Centro Científico Tecnológico Patagónico
2018-2023
University of Buenos Aires
2023
Instituto Franco-Argentino sobre Estudios de Clima y sus Impactos
2021
Lago Posadas is located at the foot of Southern Patagonian Andes, in southwestern Argentina, where early Miocene Santa Cruz Formation (SCF) shows thick and laterally continuous exposures. This region has been scarcely explored for fossil vertebrates since first efforts by J.B. Hatcher 1898-99. In this contribution, we performed sedimentologic paleontological studies order to reconstruct depositional environments associated vertebrate fauna. Sedimentologic data suggest that sedimentary record...
Detrital zircon U–Pb geochronology is a widely used technique for interpreting sedimentary provenance in basin systems. This, combined with detailed facies interpretation and stratigraphy evolution, has been extensively applied foreland settings to understand tectonic processes by tracking the exposure erosion of distinct sediment source areas through time. We present case study Miocene record NW Austral–Magallanes Basin ( c. 47° 30′ S), which associated main phase Andean uplift. define...
The early-middle Miocene continental Cerro Boleadoras Formation (CBF) crops out in the area of and Plomo on western slope Meseta del Lago Buenos Aires, northwestern Santa Cruz Province, Argentina. lower levels CBF consist laterally extensive medium to pebbly sandstone beds with trough cross-bedding, interpreted as fluvial channel deposits, interbedded tabular fine-grained floodplain deposits. Recent fieldwork provided fossil vertebrates from these an estimated age between ~16.5 Ma 15.1 (late...
Se describen 21 maderas silicificadas de la Formación Kachaike (Albiano, Cretácico medio), recolectadas en estancia Tucu Tucu, centro-oeste provincia Santa Cruz, Patagonia Argentina. Los especímenes están compuestos enteramente por xilema secundario y el grado preservación varía entre cada uno los ejemplares. estudios anatómicos indican que son coníferas afines a las familias Araucariaceae e Hirmeriellaceae (=Cheirolepidiaceae), asignadas dos especies fósiles: Agathoxylon antarcticum...
We collected nine samples from the middle Miocene of Patagonia, in outcrops Río Correntoso Formation (Río Zeballos Group) north Santa Cruz Province, Argentina. Fossil woods have variable preservation and some are poorly preserved. Six silicified, three totally carbonized. Two taxonomic units were confidently described, Cupressinoxylon sp., a conifer with Cupressaceae or Podocarpaceae affinity Nothofagoxylon scalariforme Nothofagus subgenus Nothofagaceae. Other indeterminate angiosperms...
Abstract Southern Patagonia contains several Eocene fossiliferous deposits that have only been superficially explored and studied. One of these corresponds to the La Marcelina Formation with outcrops in south-western slope Deseado Massif, Santa Cruz Province, Argentina. No detailed palynological studies performed so far this unit. Here we estimate age, palaeoenvironment, climatic conditions based on analysis terrestrially derived spores, algae cysts, pollen grains. The recovered association...
Andean retroarc basins register the onset of compressional exhumation during Late Cretaceous, evidenced by sequences showing sedimentary provenance from orogen. Recent studies propose that orogeny started earlier in central Patagonian Andes (broadly around 44-47°SL) Aptian-Albian, and latitude contraction spread northwards southwards. We present U-Pb detrital zircon geochronology Austral-Magallanes basin northern South (~47–48°SL). Littoral sandstones basal foreland yield ~123 Ma (early...
Summary Angiosperm fossil woods of putative Eocene age from Corcovado, Chubut Province are described. They placed in four taxonomic units: Weinmannioxylon trichospermoides and cf. Caldcluvioxylon the Cunoniaceae, Myrceugenellites maytenoides Myrtaceae, Nothofagoxylon ruei Nothofagaceae. The taxa assemblage accordance with similar wood assemblages previously described Oligocene Patagonia. All anatomically to trees that live today Some show decay patterns by different saproxylic organisms....
Abstract Eocene paleofloras of Patagonia are diverse and increasingly known. A new assemblage fossil wood has been recovered from sediments in Corcovado, western Argentinean Patagonia. The lithological succession (formerly Arroyo Lyn Formation sensu Pesce 1979) is correlated with the Huitrera Formation. specimens were mostly found embedded sandstones conglomerates. One-third conifers studied herein. We four taxonomic types: Agathoxylon cf. antarcticum (Araucariaceae), Phyllocladoxylon...