A5057777295- Paleontology and Stratigraphy of Fossils
- Geology and Paleoclimatology Research
- Microbial Community Ecology and Physiology
- Geological formations and processes
- Planetary Science and Exploration
- Calcium Carbonate Crystallization and Inhibition
- Geological and Tectonic Studies in Latin America
- Hydrocarbon exploration and reservoir analysis
- Administrative Law and Governance
- Geochemistry and Elemental Analysis
- Geological and Geophysical Studies Worldwide
- Coral and Marine Ecosystems Studies
- Advanced Manufacturing and Logistics Optimization
- Space Exploration and Technology
- Diatoms and Algae Research
- Methane Hydrates and Related Phenomena
- Aquatic Ecosystems and Phytoplankton Dynamics
- Interconnection Networks and Systems
- Cephalopods and Marine Biology
- Ferrocene Chemistry and Applications
- Concrete Corrosion and Durability
- Paleontology and Evolutionary Biology
- Biocrusts and Microbial Ecology
- Satellite Communication Systems
- Groundwater and Isotope Geochemistry
Research Center on Earth Sciences
2007-2023
Consejo Nacional de Investigaciones Científicas y Técnicas
2007-2023
Universidad Nacional de Córdoba
2010-2023
Universidade Federal de São Carlos
2022
Centro Científico Tecnológico - Tucumán
2010
Cambrian Innovation (United States)
2010
Spanish National Centre for Cardiovascular Research
2009
Stanford University
2002
Microbialites comprise the mineralized record of early life on Earth and preserve a spectrum fabrics that reflect complex physical, chemical, biological interactions.The relatively rarity microbialites in modern environments, however, challenges our interpretation ancient structures.Here we report occurrence microbial mats, mineral precipitates, oncoids Laguna Negra, high-altitude hypersaline Andean lake Catamarca Province, Argentina.Laguna Negra is Ca-Na-Cl brine where abundant carbonate...
Research Article| June 19, 2018 Calcium Carbonate Precipitation in Diatom-rich Microbial Mats: The Laguna Negra Hypersaline Lake, Catamarca, Argentina Fernando Javier Gomez; Gomez 1CICTERRA, Centro de Investigaciones en Ciencias la Tierra, CONICET-Universidad Nacional Córdoba, Search for other works by this author on: GSW Google Scholar Cecilia Mlewski; Mlewski Flavia Jaquelina Boidi; Boidi María Eugenia Farías; Farías 2LIMLA, Laboratorio Microbiológicas Lagunas Andinas, Planta Piloto...
Stromatolites are organo-sedimentary structures that represent some of the oldest records early biosphere on Earth. Cyanobacteria considered as a main component microbial mats supposed to produce stromatolite-like structures. Understanding role cyanobacteria and associated microorganisms mineralization processes is critical better understand what can be preserved in laminated structure stromatolites. Laguna Negra (Catamarca, Argentina), high-altitude hypersaline lake where stromatolites...
Abstract Although putative corals of uncertain affinities occur in the early Cambrian, earliest definite tabulate have not been described prior to Early Ordovician North America. This paper reports a new finding tabulate-like coralomorph forming part biostratigraphically well-constrained reef mounds latest Cambrian – La Silla Formation Argentine Precordillera. The oldest record genus Amsassia is reported and species, A . argentina , erected. discovery this lowermost modifies previously...
Abstract Environmental fluctuations are recorded in a variety of sedimentary archives lacustrine depositional systems. Geochemical signals recovered from bottom sediments closed‐basin lakes among the most sensitive paleoenvironmental indicators and commonly used reconstructing lake evolution. Microbialites (i.e., organosedimentary deposits accreted through microbial trapping binding detrital sediment or situ mineral precipitation on organics [Palaios, 2, 1987, 241]), however, have been...
Natural populations of a Rivularia-like cyanobacterium were collected from the carbonate deposits temporarily flooded littoral zone hypersaline, high elevation lake, The Laguna Negra, Andes, Argentina. Subsequently, cyanobacterial strain PUNA-NP3, named after its origin (Puna Volcanic Plateau) was isolated these rounded, pillow-like, black microbial mats. None previously described species genus Rivularia occupy inland, hypersaline aquatic environments. After morphological examination this...
Abstract The La Laja Formation (Early to Middle Cambrian) is one of the oldest units exposed at base lower Paleozoic carbonate platform Argentina Precordillera. This a key unit regarding hypothesis Precordillera as Laurentia-derived allochthonous terrane currently located in south-central Andes. According faunal affinity and stratigraphic development thick Cambrian bank, Argentine would have been attached Laurentia. contrasts with rest overlying Cambro-Ordovician by being partly mixed...
The Salar de Antofalla (salt flat) is located in the Puna region of Catamarca, northern Argentina. In this paper we report and provide first descriptive data Las Quínoas, a modern system oncoids western margin salt flat. Oncoids were studied by insitu logging, polished thin sections analysis. addition, 16s rRNA genes microbial mats associated with these amplified sequenced to characterize biodiversity. present discoidal subrounded morphologies sizes up 15 cm diameter. They are scattered...
The Altiplano-Puna region is a high-altitude plateau in South America characterized by extreme conditions, including the highest UV incidence on Earth. Laguna Negra hypersaline lake located Catamarca Province, northwestern Argentina, where stromatolites and other microbialites are found, life mostly restricted to microbial mats. In this study, particular mat that covers shore of was explored, unravel its layer-by-layer vertical structure response environmental stressors therein. Microbial...
A series of syndiospecific C1-symmetric ansa-metallocenes ([Me2X(Cp)(2-R1-3-R2-Ind)]ZrCl2, X = C, Si; R1 H, Me; R2 Me, Et, CH2SiMe3) have been synthesized, and their catalytic behavior in the polymerization propylene has studied. Upon activation with MAO, these carbon- or silicon-bridged cyclopentadienyl/indenyl systems afford polypropylene various degrees syndiotacticity ([rrrr] 28−66%), as a function substituent size, substitution pattern, bridging moiety. The produced PP samples higher...
ABSTRACT Pozo Bravo is a high-altitude Andean lake that harbors modern microbialites thriving in hypersaline conditions the Salar de Antofalla, one of driest sites on Earth and located Puna region Catamarca, northwest Argentine. Due to physiography, are restricted narrow belt following variations. Microbialites exhibit wide range external morphologies including domal, discoidal, tabular, horseshoe-like bioherms which vary considerably size, as well large biostromal terraces. As documented by...
Abstract The origin of pisoids in a diversity environments has been recently discussed. While traditionally considered physico‐chemical sedimentary products developed turbulent environments, or even grown situ , new results show that microbes may influence their development. In the Terma Los Hornos travertine system, two types actively forming were recognized: (i) laminated with concentrically crust surrounding nucleus; and (ii) dendriform radial no distinct nucleus. Laminated form pools at...
Resumen es: La Formacion Laja es una unidad clave en el marco de las teorias existentes respecto a la Precordillera Argentina, considerada como un 'terrane' aloct...
Abstract This study reports on ooid diversity from different lithotypes of the Yacoraite Formation (Salta Group basin) in Central Andes north‐west Argentina. The ooids display a variety internal and external morphologies that may be deployed as proxies for seawater chemistry hydrodynamic processes. A short review nomenclature problems is first discussed, followed by presentation two‐fold quantitative qualitative methodology. Our proposed classification addresses characters order to...