DOI: 10.1016/j.palaeo.2013.09.014
论文题名: Eocene initiation of nile drainage due to east african uplift
作者: Underwood C.J. ; King C. ; Steurbaut E.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2013
卷: 392 起始页码: 138
结束页码: 145
语种: 英语
英文关键词: Africa
; Drainage
; Egypt
; Nile
; Turkana
; Wadi Al-Hitan
英文摘要: The Late Eocene and Early Oligocene sedimentary succession in the Fayum, Egypt records the progressive development of northerly flowing Nile-type African drainage. New biostratigraphic dating of these units allows the calibration of the paleomagnetic record, the combination of dating methods enabling a detailed chronology of events to be studied. Between about 38 and 35. Ma there was a dramatic change in sedimentary regime and vast quantities of clastic material were transported into the area, smothering the underlying carbonate platform and initiating a stepwise progradation of clastic units. The sudden change in sediment availability coincides with the beginning of uplift and volcanic activity in the Turkana region of East Africa, cutting off preexisting easterly drainage from the middle of the continent. The Fayum succession therefore records the initiation of northerly drainage of central and eastern Africa, and the origins of the modern Nile watershed. The development of the current route of the Nile, with the incision of the current Nile Valley, was slightly later and related to mid Oligocene uplift of the Red Sea margins and Messinian base level fall. © 2013. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69530
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Earth and Planetary Science, Birkbeck, Malet Street, London WC1E7HX, United Kingdom; 16a Park Road, Bridport DT6 5DA, United Kingdom; Royal Belgian Institute of Natural Sciences, Vautierstraat 29, B-1000 Brussels, Belgium
Recommended Citation:
Underwood C.J.,King C.,Steurbaut E.. Eocene initiation of nile drainage due to east african uplift[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2013-01-01,392