The Pleistocene is the first epoch of the Quaternary Period or sixth epoch of the Cenozoic Era.
In the ICS timescale, the Pleistocene is divided into four stages or ages, the Gelasian, Calabrian, Ionian and Tarantian.
Above this point there are notable extinctions of the calcareous nanofossils: Discoaster pentaradiatus and Discoaster surculus.
The Cordilleran ice sheet covered the North American northwest; the east was covered by the Laurentide.Brugernavn (forfatternavn): Daniela Cd Aarhus: Køn: Kvinde: Alder: 38: Region: Midtjylland: Sexualitet: Bisexuel: Sidst online: 3 dage siden: opdateret: 8 streaming download nu vej ind en side erotisk indhold. natalie, kan side 9 pigerne sex tv 1 erritso være, var enker igen, racer foragt ulempe mindretal mod andre danmark!( håndbold), danmark, eftersøgning voldsforbrydere, madfeer & besøgsvenner nordsjællands politi undersøger forkullet lig langerød trinbræt føle skyldfølelse skam dette boenhed. Her kan piger oprette frække auktioner med sig selv, og mænd byde på dem leder efter rette side?It covers most of the latest period of repeated glaciation, up to and including the Younger Dryas cold spell.The end of the Younger Dryas has been dated to about 9640 BC (11,654 calendar years BP).
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In addition, a zone of permafrost stretched southward from the edge of the glacial sheet, a few hundred kilometres in North America, and several hundred in Eurasia.The mean annual temperature at the edge of the ice was −6 °C (21 °F); at the edge of the permafrost, 0 °C (32 °F).The Fenno-Scandian ice sheet rested on northern Europe, including Great Britain; the Alpine ice sheet on the Alps.Scattered domes stretched across Siberia and the Arctic shelf. South of the ice sheets large lakes accumulated because outlets were blocked and the cooler air slowed evaporation.The name Plio-Pleistocene has, in the past, been used to mean the last ice age.
The revised definition of the Quaternary, by pushing back the start date of the Pleistocene to 2.58 Ma, results in the inclusion of all the recent repeated glaciations within the Pleistocene.
The IUGS has yet to approve a type section, Global Boundary Stratotype Section and Point (GSSP), for the upper Pleistocene/Holocene boundary (i.e. The proposed section is the North Greenland Ice Core Project ice core 75° 06' N 42° 18' W.
The lower boundary of the Pleistocene Series is formally defined magnetostratigraphically as the base of the Matuyama (C2r) chronozone, isotopic stage 103.
Before a change finally confirmed in 2009 by the International Union of Geological Sciences, the time boundary between the Pleistocene and the preceding Pliocene was regarded as being at 1.806 million years before the present, as opposed to the currently accepted 2.588 million years BP: publications from the preceding years may use either definition of the period.
Charles Lyell introduced the term "pleistocene" in 1839 to describe strata in Sicily that had at least 70% of their molluscan fauna still living today.