A5044428654- Paleontology and Stratigraphy of Fossils
- Geology and Paleoclimatology Research
- Evolution and Paleontology Studies
- Paleontology and Evolutionary Biology
- Geological and Geochemical Analysis
- Geological formations and processes
- Marine Biology and Ecology Research
- Geological and Tectonic Studies in Latin America
- Geochemistry and Geologic Mapping
- Geological and Geophysical Studies Worldwide
- Ichthyology and Marine Biology
- Cephalopods and Marine Biology
- Plant Diversity and Evolution
- Polar Research and Ecology
- Botany and Geology in Latin America and Caribbean
- Geological Studies and Exploration
- Fish biology, ecology, and behavior
- Geological Formations and Processes Exploration
- Geological and Geophysical Studies
- Diatoms and Algae Research
- Environmental and Cultural Studies in Latin America and Beyond
- Clay minerals and soil interactions
- Medicine and Dermatology Studies History
- Image Retrieval and Classification Techniques
- Basque language and culture studies
Fundación Ciencias Exactas y Naturales
2011-2024
Consejo Nacional de Investigaciones Científicas y Técnicas
2013-2024
University of Buenos Aires
2013-2024
Argentine Antarctic Institute
2009-2022
Centro Científico Tecnológico - San Juan
2021
Universidad Complutense de Madrid
2011
Repsol (Spain)
2010
Universidad Nacional de La Plata
2010
Centro Científico Tecnológico - Tucumán
2007
Bernardino Rivadavia Natural Sciences Museum
2007
Abstract Two tuffs in the Lower Cretaceous Agrio Formation, Neuquén Basin, provided U–Pb zircon radioisotopic ages of 129.09±0.16 Ma and 127.42±0.15 Ma. Both horizons are well constrained biostratigraphically by ammonites nannofossils can be correlated with ‘standard’ sequence Mediterranean Province. The lower horizon is very close to base Upper Hauterivian upper Hauterivian/Barremian boundary, indicating that former lies at c . 129.5 latter 127 These new fill a gap over 8 million years...
Abstract. The numerical age of the Jurassic–Cretaceous boundary has been controversial and difficult to determine. In this study, we present high-precision U–Pb geochronological data around in two distinct sections from different sedimentary basins: Las Loicas, Neuquén Basin, Argentina, Mazatepec, Sierra Madre Oriental, Mexico. These contain primary secondary fossiliferous markers for as well interbedded volcanic ash horizons, allowing researchers obtain new radioisotopic dates late...
Basin to mid-ramp cyclic facies of the Tithonian Vaca Muerta Formation are exposed in Loncoche Creek section Neuquén Basin, Mendoza province, Argentina.This unit is characterized by a decimeter-scale rhythmic alternation marls, shales and limestones extends from lower upper Berriasian.Cyclostratigraphic studies based on detailed analysis allowed identification patterns with frequencies within Milankovitch band.According biostratigraphic data, dominant cycle studied has period 20 k.y., which...
The Late Cretaceous -Early Paleogene succession exposed in the type area of Roca Formation (General Roca, Río Negro Province), has been sampled detail.Analyses calcareous nannofossil assemblages indicate Maastrichtian Danian interval (CC26-NP4 zones; MARTINI 1971), which is first proved evidence mentioned area.Moreover, "Rocanense" invertebrate fauna placed a high resolution biostratigraphic scheme based on zones, and three have recognized.
NANNOCONIDS OF THE MENDOZA GROUP (LOWER CRETACEOUS) NEUQUEN PROVINCE, REPUBLICA ARGENTINA: TAXONOMY, CRONOSTRATIGRAPHY AND PALEOGEOGRAPHIC SIGNIFICANCE. Late Jurassic-Early Cretaceous nannoconid assemblages are reported from 11 sections in the Neuquén Basin. Six species and subspecies of Nannoconus Kamptner studied systematically. Among them, kamptneri minor Bralower, Brönnimann, bucheri circularis Deres Achéritéguy ligius Applegate Bergen highlighted as markers for interval. elongatus...
RESUMENSe caracteriza bioestratigráfica y paleoambientalmente a la Formación Agrio en sección Cuesta del Chihuido, el sur de Provincia Mendoza (35º45'S/69º34'W), Argentina.Se han reconocido treinta siete especies nanofósiles, cuatro foraminíferos seis ostrácodos.Los nanofósiles permiten asignar edad al Valanginiano superior-Hauteriviano superior e incluir asociación las Zonas CC4A CC4B.En base sección, foraminífero bentónico Epistomina loncochensis Ballent radiolarios sugieren condiciones...
Abstract A total of 113 species belonging to 54 genera are recovered from a study the M aastrichtian and D anian deposits in C erro zul section N euquén B asin, west‐central rgentina. Of these, 9 new genera, 38 28 open nomenclature recorded. These form basis present listed below. Genera: P helocyprideis gen. nov., leisocythereis patoleberis imicocythereis astillocythereis H ysterocythereis O rthrocosta etalocythereis nov. Sthenarocythereis Species: ytherella saraballentae sp. semicatillus...
Abstract del Río, C.J., Martínez, S.A., Stilwell, J.D. & Concheyro, A., September, 2007. Palaeontology of the Cerros Bayos section, Roca Formation (Danian), La Pampa Province, Argentina. Alcheringa 31, 241-269. ISSN 0311-5518. New mollusc and echinoid faunas are recorded from exposures at (La Province) assigned to Maastrichtian – Danian (CC26 NP3 Zones Martini 1971 Martini, E. Standard Tertiary Quaternary calcareous nannoplankton zonation. Proceedings 2° Planktonic Conference, Rome....
This study presents new mineralogical, sedimentological, and micropaleontological data from the Jagüel (Late Maastrichtian-Early Danian) Roca (Danian) formations, located in eastern sector of Pellegrini Lake, Río Negro province, República Argentina. According to physical characteristics age sediments that conform these two siliciclastic lithofacies a carbonate one were recognized, they are named: Maastrichtian grayish yellow calcareous mudstones, Danian olive gray carbonates. The rocks which...
Foraminiferal assemblages recovered from Cape Lamb sediments on Vega Island are examined and illustrated herein. The foraminifera were discovered in Cenozoic debris palagonitic breccia lithofacies that crop out at the southwestern tip of Lamb. Among all diamictite deposits recognized this island, studied youngest most fossiliferous. Pectinids, brachiopods, microfaunas exceptionally well preserved indicate little or no transport. foraminiferal assemblage is dominated by infaunal species, with...