A5064696111- Paleontology and Stratigraphy of Fossils
- Geology and Paleoclimatology Research
- Geological and Geochemical Analysis
- Geological formations and processes
- Geochemistry and Elemental Analysis
- Evolution and Paleontology Studies
- Paleontology and Evolutionary Biology
- Geological and Tectonic Studies in Latin America
- Bat Biology and Ecology Studies
- Geochemistry and Geologic Mapping
- Plant Diversity and Evolution
- Microbial Community Ecology and Physiology
- Geological and Geophysical Studies Worldwide
- Fish biology, ecology, and behavior
- Pleistocene-Era Hominins and Archaeology
- Hydrocarbon exploration and reservoir analysis
- Ichthyology and Marine Biology
- earthquake and tectonic studies
- Geomagnetism and Paleomagnetism Studies
- Amphibian and Reptile Biology
- Marine Biology and Ecology Research
- Clay minerals and soil interactions
- Coastal and Marine Dynamics
- Archaeology and ancient environmental studies
- Archaeological and Geological Studies
Universidad Nacional de La Plata
2015-2024
Consejo Nacional de Investigaciones Científicas y Técnicas
2015-2024
Research Center on Earth Sciences
2020-2024
Fundación Ciencias Exactas y Naturales
2023
University of Buenos Aires
2023
Bernardino Rivadavia Natural Sciences Museum
2008-2021
Centro Científico Tecnológico - San Juan
2011-2020
National University of Río Cuarto
2020
Centro Científico Tecnológico - Tucumán
2005-2017
New York Proton Center
2017
Research Article| May 01, 2014 The puzzle assembled: Ediacaran guide fossil Cloudina reveals an old proto-Gondwana seaway L.V. Warren; Warren * 1Departamento de Geologia Aplicada, Instituto Geociências e Ciências Exatas, Universidade Estadual Paulista, Avenida 24A, 1515, Rio Claro 13506-900, Brazil *E-mail: warren@rc.unesp.br. Search for other works by this author on: GSW Google Scholar F. Quaglio; Quaglio 2UNESPetro–Centro Aplicadas ao Petróleo, C. Riccomini; Riccomini 3Instituto...
We describe stromatolites forming at an altitude of 3570 m the shore a volcanic lake Socompa, Argentinean Andes. The water site formation is alkaline, hypersaline, rich in inorganic nutrients, very arsenic, and warm (20–24°C) due to hydrothermal input. do not lithify, but form broad, rounded low-domed bioherms dominated by diatom frustules aragonite micro-crystals agglutinated extracellular substances. In comparison other modern stromatolites, they harbour atypical microbial community...
Despite the abundant fossil content of Mata Amarilla Formation (Southern Patagonia, Santa Cruz Province, Argentina), its age has always generated a considerable number questions and debates. The chronological data provided by invertebrates, dinosaurs, fish, turtles, plesiosaurs flora are contradictory. In this work, twenty U–Pb spot analyses laser ablation were carried out on outer parts zoned zircon crystals from tuff layer middle section Formation, yielding concordia 96.23 ±...
We combined nucleic acid-based molecular methods, biogeochemical measurements, and physicochemical characteristics to investigate microbial sedimentary ecosystems of Laguna Tebenquiche, Atacama Desert, Chile. Molecular diversity, biogeochemistry hypersaline mats, rhizome-associated concretions, an endoevaporite were compared with: The V4 hypervariable region the 16S rRNA gene was amplified by pyrosequencing analyze total diversity (i.e., bacteria archaea) in bulk samples, addition, detail on...
Abstract The origin, affinity and paleoecology of macrofossils soft-bodied organisms the terminal Ediacaran Period have been highly debated. Previous discoveries in South America are restricted to small shelly metazoans Nama Assemblage. Here we report for first time occurrence discoidal structures from Upper Cerro Negro Formation, La Providencia Group, Argentina. Specimens preserved tabular sandstones with microbially-induced sedimentary structures. Flute marks linear scours at base...
Terra Nova, 23, 382–389, 2011 Abstract An in situ assemblage of Cloudina , thrombolites and an ichnofossil (cf . Archaeonassa ), together with fragments Corumbella werneri is reported here, from a tidally influenced, shallow, lagoonal setting on carbonate ramp within the Itapucumi Group, Paraguay. The association comparable to other terminal Neoproterozoic occurrences, but coexistence shelly fossils trace microbially induced sedimentary structures apparently unique. This discovery extends...
Benthic microbial ecosystems of Laguna La Brava, Salar de Atacama, a high altitude hypersaline lake, were characterized in terms bacterial and archaeal diversity, biogeochemistry, (including O2 sulfide depth profiles mineralogy), physicochemical characteristics. Brava is one several lakes the Atacama where communities are growing extreme conditions, including salinity, solar insolation, levels metals such as lithium, arsenic, magnesium, calcium. Evaporation creates conditions these mineral...
The geological timescale before 720 Ma uses rounded absolute ages rather than specific events recorded in rocks to subdivide time. This has led increasingly mismatches between subdivisions and the features for which they were named. Here we review formal processes that current timescale, outline rock-based concepts could be used pre-Cryogenian time propose revisions. An appraisal of Precambrian rock record confirms purely chronostratigraphic subdivision would require only modest deviation...