A5038477306- Geology and Paleoclimatology Research
- Marine Biology and Ecology Research
- Paleontology and Stratigraphy of Fossils
- Geochemistry and Geologic Mapping
- Geological and Tectonic Studies in Latin America
- Evolution and Paleontology Studies
- Marine and coastal ecosystems
- Morphological variations and asymmetry
- Environmental and Ecological Studies
- Geological formations and processes
- Diatoms and Algae Research
- Cephalopods and Marine Biology
- Methane Hydrates and Related Phenomena
- Geography and Education Methods
- Educational methodologies and cognitive development
- Geophysical Methods and Applications
- Pleistocene-Era Hominins and Archaeology
- Geophysical and Geoelectrical Methods
- Land Use and Ecosystem Services
- Subterranean biodiversity and taxonomy
- Groundwater and Isotope Geochemistry
- Educational theories and practices
- Soil Geostatistics and Mapping
- Geotechnical and construction materials studies
- Archaeological and Geological Studies
Universidad Nacional de La Plata
2013-2024
Research Article| April 01, 2011 BENTHIC FORAMINIFERAL MORPHOGROUPS ON THE ARGENTINE CONTINENTAL SHELF Marta Inés Alperin; Alperin 3 1Cátedra de Estadística, Facultad Ciencias Naturales y Museo, Universidad Nacional La Plata, Buenos Aires, Argentina; Edificio Institutos Laboratorios, Calle 64 120, 1900 Argentina 3Correspondence author: E-mail: alperin@fcnym.unlp.edu.ar; marta.alperin@gmail.com Search for other works by this author on: GSW Google Scholar Gabriela Catalina Cusminsky; Cusminsky...
Ostracods are microcrustaceans with a calcareous carapace, very useful as paleoenvironmental indicators. Eucypris fontana (Graf, 1931) is non-marine ostracod species, distributed in southern Neotropics, commonly found living bisexual populations well quaternary sequences Patagonia. Geometry morphometric analysis offers efficient and powerful techniques to quantify, describe analyze shape size variations. In this study, phenotypic changes the carapace (size shape) of E. were analyzed using...
Abstract The well-exposed marine Eocene units from southwestern Patagonia, Argentina, contain useful information for reconstructing regional climate and oceanographic patterns in an area adjacent to the Drake Passage. aim of this paper is integrate dinoflagellate cyst data three sections Austral Basin (Río Turbio Formation) propose a zonation scheme, which can be applied other Atlantic Ocean sites. Assemblages organic walled cysts have been analysed different cropping-out cores, showing high...
Para comprender los cambios climáticos y paleoceanográficos ocurridos durante el Paleógeno en Hemisferio Sur especialmente aquellos relacionados con la apertura del Pasaje de Drake, es esencial correlacionar las unidades litoestratigráficas áreas adyacentes a dicho pasaje como cuencas Austral-Magallanes James Ross, al norte sur, respectivamente. Por muchos años, no se contó una correlación dichas debido ausencia información crono bioestratigráfica confiable. Recientemente, otros autores...
The middle—late Eocene (45–36 Ma) dinoflagellate cyst distribution in high latitudes of the Southern Hemisphere has been explained by a surface ocean circulation pattern characterized extensive subpolar gyres around Antarctica. Based on global paleoclimate models it proposed that these might favored development an Antarctic—endemic assemblage, which was consistently abundant until end Eocene. During late deepening Tasman Gateway and Drake Passage would have generated circumpolar water flow...
Abstract A proper understanding of the palaeoceanographic evolution Drake Passage during Palaeogene is hampered by lack precise tools to date and correlate sedimentary units areas adjacent region. In this work, considering recently published radiometric U–Pb dates, we revised age a previous dinoflagellate zones for middle upper Eocene Austral–Magallanes Basin. The quantitative analysis late cyst assemblages from different localities close allowed us reconstruct palaeoenvironmental conditions...
In order to characterize Patagonian (Argentina) ecoregions using non-marine ostracods, their associations in 69 environments were assessed. Twenty eight taxa recorded, including 12 endemic of the Neotropical region. Our results indicate that ostracods are mainly influenced by electrical conductivity (EC), altitude, pH, and temperature; shows a correlation with Argentinian ecoregions. Assemblage I is composed sites located at high altitude Andean forest ecoregion. Host waters have low...
Changes in the ostracod assemblages from two sediment cores collected Lago Cardiel southeastern Patagonia (49°S) reflect main regional abrupt climatic changes over last 15.6 cal. ka BP . Shifts species abundance and switches dominances suggest that these were mainly driven by variable salinity. During Late Pleistocene, Limnocythere rionegroensis was abundant dominant, indicating waters with high salinity prevalence of evaporative processes. Between 12.6 10.8 , expanded markedly reached an...
Geometric morphometric methods are powerful tools to discriminate between closely related ostracods taxa as well study the relationship their morphological variations, taxonomy and paleoecology. In this study, valve outline analysis allows discrimination non-marine ostracod C. silvestrii R. whatleyi juveniles, pointing out differences in posterior area surface ornamentation. Modern female specimens of from 23 sites located a spatial transect (41 51 °S) exhibited extensive variability, on...
Purísima-Rumicruz district consists of several polymetallic veins, rich in copper and lead. The veins have a breccia texture are located shear bands, with locally high concentrations sulfides carbonatic gangue. host rock the black shale sequence thin levels fine sands, low degree metamorphism, corresponds to Acoite formation (Lower Ordovician). depositional environment was an open clastic platform where storm processes prevailed. An exploratory program using induced polarization resistivity...
El presente estudio se desarrolla a lo largo de 6 km costa, al Este del Puerto Quequén, Partido Necochea, provincia Buenos Aires. En este sector históricamente vinculan varios usos territorio en relación con las actividades económicas dominantes, la portuaria, navegación, pesca y deportivas, recreativas turísticas.La recuperación económica iniciada los últimos años ha impulsado el desarrollo expansión playa comprendido entre Escollera Noreste Costa Bonita. Los sistemas implicados...
El objetivo general del trabajo es caracterizar la distribución espacial de las concentraciones nitratos, sulfatos, fluoruros y arsénico total en aguas acuífero Pampeano ciudad Pergamino, el único medio aprovisionamiento agua ciudad. Los datos fueron obtenidos por Obras Sanitarias Pergamino corresponden al promedio los iones 53 pozos muestreados bimestralmente periodo 2006-2014. Se utilizaron métodos geoestadísticos para analizar análisis. La sulfato, si bien no supera ningún pozo valores...