Soanian
Subdivisions of the Quaternary Period | ||||
---|---|---|---|---|
System/ Period |
Series/ Epoch |
Stage/ Age |
Age | |
Quaternary | Holocene | Meghalayan | 0 | 4,200 |
Northgrippian | 4,200 | 8,200 | ||
Greenlandian | 8,200 | 11,700 | ||
Pleistocene | 'Upper' | 11,700 | 129ka | |
Chibanian | 129ka | 774ka | ||
Calabrian | 774ka | 1.80Ma | ||
Gelasian | 1.80Ma | 2.58Ma | ||
Neogene | Pliocene | Piacenzian | 2.58Ma | 3.60Ma |
Subdivision of the Quaternary Period according to the ICS, as of January 2020.[1]
For the Holocene, dates are relative to the year 2000 (e.g. Greenlandian began 11,700 years before 2000). For the beginning of the Northgrippian a date of 8,236 years before 2000 has been set.[2] The Meghalayan has been set to begin 4,250 years before 2000.[1] 'Tarantian' is an informal, unofficial name proposed for a stage/age to replace the equally informal, unofficial 'Upper Pleistocene' subseries/subepoch. 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 Soanian is an archaeological culture of the Lower Paleolithic (ca. 500,000 to 1250,000 BP) in South Asia, contemporary to the Acheulean. It is named after the Soan Valley in the Sivalik Hills, Pakistan. The bearers of this culture were Homo erectus.
On Adiyala and Khasala about 16 km (10 miles) from Rawalpindi terrace on the bend of the river hundreds of edged pebble tools were discovered. At Chauntra hand axes and cleavers were found. No human skeletons of this age have yet been found. In the Soan River Gorge many fossil bearing rocks are exposed on the surface. The 14 million year old fossils of gazelle, rhinoceros, crocodile, giraffe and rodents have been found there. Some of these fossils are in display at the Natural History Museum of Islamabad.
External links
See also
- ^ a b c Cohen, K. M.; Finney, S. C.; Gibbard, P. L.; Fan, J.-X. (January 2020). "International Chronostratigraphic Chart" (PDF). International Commission on Stratigraphy. Retrieved 23 February 2020.
- ^ a b Mike Walker; et al. (December 2018). "Formal ratification of the subdivision of the Holocene Series/Epoch (Quaternary System/Period)" (PDF). Episodes. 41 (4). Subcommission on Quaternary Stratigraphy (SQS): 213–223. doi:10.18814/epiiugs/2018/018016. Retrieved 11 November 2019. This proposal on behalf of the SQS has been approved by the International Commission on Stratigraphy (ICS) and formally ratified by the Executive Committee of the International Union of Geological Sciences (IUGS).