Late Quaternary palaeolake levels in Tengger Desert, NW China

Late Quaternary palaeolake levels in Tengger Desert, NW China Comprehensive field investigations and laboratory analyses show that palaeolakes, including the Megalake Tengger, and other semi-connected and isolated water bodies, during late Pleistocene covered an area of more than 20,000 km 2 . This is an area more than half the size of the Tengger Desert in NW China. Stratigraphic correlations and chronological evidence indicate that the palaeolakes started to develop around 42,000 14 C year BP (uncalibrated, all throughout the paper) but their extent was limited until 37,000 14 C year BP. Based on the chronology of representative lacustrine deposits, it can be deduced that the Megalake Tengger was established around 35,000 14 C year BP and maintained until 22,000 14 C year BP, leading to the formation of the Baijian Hu terraces, which are regarded as firm evidence of the existence of palaeolakes. The formation mechanism is unclear and the climate situation at the time is still an open question. The Holocene palaeolakes started to develop around 12,000 14 C year BP. The Baijian Hu terraces indicate that the high water levels in the area occurred around 8500, 5400–5100, 3500, and 1860–1370 14 C year BP. The extent of the Holocene palaeolakes, primarily migratory lakes, was smaller than that of the Late Pleistocene palaeolakes. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png "Palaeogeography, Palaeoclimatology, Palaeoecology" Elsevier

Late Quaternary palaeolake levels in Tengger Desert, NW China

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Publisher
Elsevier
Copyright
Copyright © 2004 Elsevier B.V.
ISSN
0031-0182
eISSN
1872-616X
D.O.I.
10.1016/j.palaeo.2004.04.006
Publisher site
See Article on Publisher Site

Abstract

Comprehensive field investigations and laboratory analyses show that palaeolakes, including the Megalake Tengger, and other semi-connected and isolated water bodies, during late Pleistocene covered an area of more than 20,000 km 2 . This is an area more than half the size of the Tengger Desert in NW China. Stratigraphic correlations and chronological evidence indicate that the palaeolakes started to develop around 42,000 14 C year BP (uncalibrated, all throughout the paper) but their extent was limited until 37,000 14 C year BP. Based on the chronology of representative lacustrine deposits, it can be deduced that the Megalake Tengger was established around 35,000 14 C year BP and maintained until 22,000 14 C year BP, leading to the formation of the Baijian Hu terraces, which are regarded as firm evidence of the existence of palaeolakes. The formation mechanism is unclear and the climate situation at the time is still an open question. The Holocene palaeolakes started to develop around 12,000 14 C year BP. The Baijian Hu terraces indicate that the high water levels in the area occurred around 8500, 5400–5100, 3500, and 1860–1370 14 C year BP. The extent of the Holocene palaeolakes, primarily migratory lakes, was smaller than that of the Late Pleistocene palaeolakes.

Journal

"Palaeogeography, Palaeoclimatology, Palaeoecology"Elsevier

Published: Aug 19, 2004

References

  • A role for the tropical pacific
    Cane, M
  • Holocene environmental changes in Bangong Co basin (western Tibet). Part 4: discussion and conclusions
    Gasse, F; Fontes, J.-Ch; Van Campo, E; Wei, K
  • A late Pleistocene–Holocene lacustrine record from Lake Manas, Zunggar (northern Xinjiang, western China)
    Rhodes, T.E; Gasse, F; Lin, R; Fontes, J.-Ch; Wei, K; Bertrand, P; Gibert, E; Melieres, F; Tucholka, P; Wang, Z; Cheng, Z

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