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The Late Pleistocene is an unofficial age in the international geologic timescale in chronostratigraphy, also known as the Upper Pleistocene from a stratigraphic perspective. It is intended to be the fourth division of the Pleistocene Epoch within the ongoing Quaternary Period. It is currently defined as the time between c. 129,000 and c ...
Late Pleistocene in northern Spain, by Mauricio Antón.Left to right: wild horse; woolly mammoth; reindeer; cave lion; woolly rhinoceros Mural of the La Brea Tar Pits by Charles R. Knight, including sabertooth cats (Smilodon fatalis, left) ground sloths (Paramylodon harlani, right) and Columbian mammoths (Mammuthus columbi, background)
Rhode Island's surficial geology includes sediments, soil and groundwater near the surface and lying atop the bedrock lithology. As a result of Pleistocene glaciation, much of the state is covered in glacial till including virtually all of the towns of Tiverton, Middletown, Newport, Portsmouth, Bristol, Jamestown, Burrilville and Foster.
Like during the Triassic and Jurassic, Rhode Island's sediments were being eroded away rather than deposited during the ensuing Paleogene and Neogene periods of the Cenozoic era, leaving another gap in the state's geologic and fossil record. More recently, during the Pleistocene, Rhode Island was scoured by glaciers. [2]
In biogeography, geodispersal is the erosion of barriers to gene flow and biological dispersal (Lieberman, 2005.; [1] Albert and Crampton, 2010. [2]). Geodispersal differs from vicariance, which reduces gene flow through the creation of geographic barriers. [3]
Steller's sea cow (Hydrodamalis gigas) is an extinct sirenian described by Georg Wilhelm Steller in 1741. At that time, it was found only around the Commander Islands in the Bering Sea between Alaska and Russia; its range extended across the North Pacific during the Pleistocene epoch, and likely contracted to such an extreme degree due to the glacial cycle.
The Pleistocene (/ ˈ p l aɪ s t ə ˌ s iː n,-s t oʊ-/ PLY-stə-seen, -stoh-; [4] [5] referred to colloquially as the Ice Age) is the geological epoch that lasted from c. 2.58 million to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations.
The southern route dispersal is primarily linked to the Initial Upper Paleolithic expansion of modern humans and "ascribed to a population movement with uniform genetic features and material culture" (Ancient East Eurasians), which was the major source for the peopling of the Asia–Pacific region.