|Subdivisions of the Quaternary System|
|In Europe and North America, the Holocene is subdivided into Preboreal, Boreal, Atlantic, Subboreal, and Subatlantic stages of the Blytt-Sernander time scale. There are many regional subdivisions for the Upper or Late Pleistocene; usually these represent locally recognized cold (glacial) and warm (interglacial) periods. The last glacial period ends with the cold Younger Dryas substage.|
The Late Pleistocene is a geochronological age of the Pleistocene Epoch and is associated with Upper Pleistocene or Tarantian stage Pleistocene series rocks. The beginning of the stage is defined by the base of the Eemian interglacial phase before the final glacial episode of the Pleistocene 126,000 ± 5,000 years ago. The end of the age is defined as 11,700 calendar years b2k (before AD 2000). The age represents the end of the Pleistocene epoch and is followed by the Holocene epoch.
Much of the Late Pleistocene age was dominated by glaciation (the Wisconsin glaciation in North America and corresponding glacial periods in Eurasia). Many megafauna became extinct over this age, a trend that continued into the Holocene. Also, human species other than modern humans died out during the Pleistocene. Humanity spread to every continent except for Antarctica during the Late Pleistocene.
According to George Carr Frison, Bison occidentalis and Bison antiquus, an extinct subspecies of the smaller present-day bison, survived the Late Pleistocene period, between about 12,000 and 11,000 years ago. Plains and Rocky Mountain First Nations depended on these bison as their major food source.[Notes 1]
- Frison noted that the "oldest, well-documented bison kills by pedestrian human hunters in North America date to about 11,000 years ago".
- Frison, George C. (August 2000), Prehistoric Human and Bison Relationships on the Plains of North America, Edmonton, Alberta: International Bison Conference
- Walker, M.; Johnsen, S.; Rasmussen, S.O.; Popp, T.; Steffensen, J.-P.; Gibbard, P.; Hoek, W.; Lowe, J.; John, A.; John, B.; Björck, S.; L. Cwynar; K. Hughen; K. Konrad; K. Peter; B. Kromer; T. Litt; D.J. Lowe; T. Nakagawa; R. Newnham; J. Schwander (2009) . "Formal definition and dating of the GSSP (Global Stratotype Section and Point) for the base of the Holocene using the Greenland NGRIP ice core, and selected auxiliary records" (PDF). Journal of Quaternary Science (John Wiley & Sons) 24 (11): 3–17. ISSN 0267-8179. Retrieved 20 September 2013.
- Ehlers, J., and P.L. Gibbard, 2004a, Quaternary Glaciations: Extent and Chronology 2: Part II North America. Elsevier, Amsterdam. ISBN 0-444-51462-7
- Ehlers, J., and P L. Gibbard, 2004b, Quaternary Glaciations: Extent and Chronology 3: Part III: South America, Asia, Africa, Australia, Antarctica. ISBN 0-444-51593-3
- Gillespie, A.R., S.C. Porter, and B.F. Atwater, 2004, The Quaternary Period in the United States. Developments in Quaternary Science no. 1. Elsevier, Amsterdam. ISBN 978-0-444-51471-4
- Mangerud, J., J. Ehlers, and P. Gibbard, 2004, Quaternary Glaciations : Extent and Chronology 1: Part I Europe. Elsevier, Amsterdam. ISBN 0-444-51462-7
- Sibrava, V., Bowen, D.Q, and Richmond, G.M., 1986, Quaternary Glaciations in the Northern Hemisphere, Quaternary Science Reviews. vol. 5, pp. 1–514.
|Early | Middle | Late||Preboreal | Boreal |
Atlantic | Subboreal | Subatlantic