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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.
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 Iowa Pleistocene snail was thought to be extinct until it was discovered in 1955 by a scientist working in northeastern Iowa. It was listed as endangered by the United States in 1978. The main cause of the snail's decline is climate change, as it is restricted to patches of cold habitat in warmer surroundings. The snail is considered to be ...
Coquina obtained from this formation on Anastasia Island was used to construct Castillo de San Marcos during the late 17th century; a local material, it was relatively easy to quarry and proved to be effective for absorbing cannon damage. [3] This formation is an integral part of the surficial aquifer system. [4] [5] [6]
Other groups of carnivorans did not arrive in South America until much later. Dogs and weasels appear in South America about 2.9 Ma ago, but do not become abundant or diverse until the early Pleistocene. [106] Bears, cats, and skunks do not appear in South America until the early Pleistocene (about 1 Ma ago or slightly earlier). [106]
These include dispersal, colonisation-competition trade off and prominent examples that have been previously studied. One classic scientific model in biogeography posits that a species must continue to colonize new areas through its life cycle (called a taxon cycle ) in order to persist.
Artist's conception of Pleistocene Vero Man hunters and two Arctodus cave bears. Vero Man refers to a set of fossilized human bones found near Vero (now Vero Beach), Florida, in 1915 and 1916. The human bones were found in association with those of Pleistocene animals. Pleistocene dates range from 2,580,000 to 11,700 years ago.
'Ubeidiya (Arabic: العبيدية, romanized: `Ubaydiyya; Hebrew: עובידיה), some 3 km south of the Sea of Galilee, in the Jordan Rift Valley, Israel, is an archaeological site of the early Pleistocene, [1] c. 1.5 million years ago, preserving traces of one of the earliest migrations of Homo erectus out of Africa, with (as of 2014) only ...