Results 1 to 10 of about 68 (65)

Microbial and Geochemical Diversity of Laguna Timone, an Extreme Hypersaline Crater Lake in Patagonia (52° S). [PDF]

open access: yesMicroorganisms
Extreme environments, such as hypersaline habitats, hot springs, deep-sea hydrothermal vents, glaciers, and permafrost, provide diverse ecological niches for studying microbial evolution.
Henríquez C   +8 more
europepmc   +2 more sources

Two Small Volcanoes, One Inside the Other: Geophysical and Drilling Investigation of Bažina Maar in Western Eger Rift

open access: yesEarth and Space Science, Volume 10, Issue 8, August 2023., 2023
Abstract Maar‐diatreme volcanoes are small volcanic structures with a funnel‐shaped crater surrounded by a tephra‐ring. They are usually formed by the explosive phreatomagmatic eruptions when groundwater comes into the contact with magma. We focus on such a structure in the geodynamically active western Eger Rift (Czech Republic) and present results ...
Pavla Hrubcová   +11 more
wiley   +1 more source

A Revised Estimate of Early Pliocene Global Mean Sea Level Using Geodynamic Models of the Patagonian Slab Window

open access: yesGeochemistry, Geophysics, Geosystems, Volume 24, Issue 2, February 2023., 2023
Abstract Paleoshorelines serve as measures of ancient sea level and ice volume but are affected by solid Earth deformation including processes such as glacial isostatic adjustment (GIA) and mantle dynamic topography (DT). The early Pliocene Epoch is an important target for sea‐level reconstructions as it contains information about the stability of ice ...
Andrew Hollyday   +5 more
wiley   +1 more source

Propuesta metodológica para el estudio de la variabilidad en el uso de fuentes líticas (campo volcánico Pali Aike, Patagonia argentina)

open access: yesRevista del Museo de Antropologia, 2023
La roca de grano fino oscura tipo Potrok Aike (RGFO PKA) fue la más utilizada por los cazadores-recolectores para confeccionar artefactos en el campo volcánico Pali Aike (CVPA), Patagonia meridional. A pesar de la importancia regional del recurso lítico,
María Cecilia Pallo   +2 more
doaj   +3 more sources

Effects of dispersal strategy and migration history on genetic diversity and population structure of Antarctic lichens

open access: yesJournal of Biogeography, Volume 48, Issue 7, Page 1635-1653, July 2021., 2021
Abstract Aim The homogenisation of historically isolated gene pools has been recognised as one of the most serious conservation problems in the Antarctic. Lichens are the dominant components of terrestrial biotas in the Antarctic and in high mountain ranges of southern South America.
Elisa Lagostina   +12 more
wiley   +1 more source

Explotación y circulación de rocas de grano fino oscuras tipo Potrok Aike: el análisis de dos conjuntos líticos de Patagonia extremo sur continental (Argentina)

open access: yesRevista del Museo de Antropologia, 2020
El objetivo de este trabajo es analizar la abundancia, características tecno-morfológicas y la intensidad de uso de los artefactos confeccionados con Rocas de Grano fino Oscuras tipo Potrok Aike (RGFO PKA) en dos muestras de superficie recuperadas en ...
Natalia Andrea Cirigliano   +2 more
doaj   +1 more source

Una aproximación a la distribución de la producción laminar en Patagonia meridional

open access: yesRevista del Museo de Antropologia, 2020
Se presenta una primera aproximación a la distribución de la producción laminar manufacturada en lutita al sur de la sierra Baguales (Patagonia sur continental, entre Argentina y Chile).
Cecilia Pallo   +3 more
doaj   +1 more source

Figurative representations of the Pali Aike volcanic field (Santa Cruz, Argentina - Magallanes, Chile) in comparative perspective with the southern extreme of Patagonia

open access: yesDocumenta Praehistorica, 2023
This paper aims to make a comparison of the figurative representations of the Pali Aike volcanic field (province of Santa Cruz, Argentina – province of Magallanes, Chile) with those registered in other sectors of southern Patagonia, such as the southern
Paula Daniela Funes
doaj   +1 more source

Species–area relationships on small islands differ among plant growth forms

open access: yesGlobal Ecology and Biogeography, Volume 29, Issue 5, Page 814-829, May 2020., 2020
Abstract Aim We tested whether species–area relationships of small islands differ among plant growth forms and whether this influences the prevalence of the small‐island effect (SIE). The SIE states that species richness on small islands is independent of island area or relates to area in a different way compared with larger islands.
Julian Schrader   +6 more
wiley   +1 more source

The influence of regional stress and structural control on the shape of maar craters

open access: yesVolcanica, 2021
Maars are volcanic craters excavated by the interaction of magma and groundwater in subsurface phreatomagmatic explosions. Maar craters display a variety of shapes and sizes, but commonly display elongation.
Cody Nichols, Alison Graettinger
doaj   +1 more source

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