Buscar
Mostrando ítems 81-90 de 1050
An intertropical opossum (Mammalia, Marsupialia, Didelphidae) from the late Middle–Late Pleistocene of austral South America
(Taylor & Francis, 2017-07)
The record of an opossum is reported here coming from a Middle–Late Pleistocene fluvial sedimentary sequence outcropping in the austral Chaco geomorphological region, Santa Fe province. Despite this family has different ...
Ostracode biofacies and shell chemistry reveal quaternary aquatic transitions in the Pozuelos basin (Argentina)
(Society for Sedimentary Geology, 2017-06-01)
Here we present the first use of calcareous microfossils to examine the late Quaternary paleoecology of the endorheic Pozuelos Basin (Argentina). Modern deposition in the basin centers on Laguna de los Pozuelos (LP),a shallow ...
FORAMINIFERAL RECORD OF CHANGES IN SUMMER MONSOON PRECIPITATION AT THE SOUTHEASTERN BRAZILIAN CONTINENTAL MARGIN SINCE THE LAST GLACIAL MAXIMUM
(SOC BRASILEIRA PALEONTOLOGIA, 2010)
Changes in the oxygen isotopic composition of the planktonic foraminifer Globigerinoides ruber and in the foraminifera faunal composition in a core retrieved from the southeastern Brazilian continental margin were used to ...
Austroborus cordillerae (Mollusca: Gastropoda) from central Argentina: a rare, little-known land snail
(Zoo Outreach Organization, 2021-09-27)
In the central region of Argentina, there is a diverse land snail fauna dominated by endemic species. Among them, Austroborus cordillerae (Doering) is a little-known species that could be on the verge of extinction. This ...
Late Quaternary in a South Atlantic estuarine system: Stratigraphic and paleontologic indicators of coastal evolution.
(Pergamon-elsevier Science Ltd, 2013-05)
The decisive influence of Late Quaternary sea level changes on the geological evolution of the coastal plain and adjacent continental shelf around the world has long been recognized. Coastal environments evolve actively ...
Glacial geomorphology of the Chirripó National Park, Costa Rica
(2019)
Several regions of tropical America show imprints of past glacial activity. These relict landforms
can support the understanding of past climate conditions, such as during the Last Glacial
Maximum (LGM), and the implications ...
Variable impact of late-Quaternary megafaunal extinction in causing ecological state shifts in North and South America
(National Academic Sciences, 2016)
Loss of megafauna, an aspect of defaunation, can precipitate many ecological changes over short time scales. We examine whether megafauna loss can also explain features of lasting ecological state shifts that occurred as ...
Late Quaternary megafans, fans and fluvio-aeolian interactions in the Bolivian Chaco, Tropical South America
(2012-10-15)
The Chaco is a huge plain and a main biogeographic biome of South America dominated by subtropical semi-deciduous vegetation that spreads on the Andes footslope on more than 800,000km 2 through Bolivia, Argentina and ...
Phylogeography in Galaxias maculatus (Jenyns, 1848) along Two Biogeographical Provinces in the Chilean Coast
(Public Library Science, 2015)
Major geologic and climatic changes during the Quaternary exerted a major role in shaping past and contemporary distribution of genetic diversity and structure of aquatic organisms in southern South America. In fact, the ...