Late Quaternary Shorelines of Lake Naivasha, Kenya
Late Quaternary Shorelines of Lake Naivasha, Kenya
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肯尼亚奈瓦沙湖晚第四纪海岸线
DOI：
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发表时间：
1975
期刊：
影响因子：
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通讯作者：
C. Washbourn
中科院分区：
文献类型：
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作者：
C. Washbourn
Celia Kamau博士是内罗毕肯雅塔大学学院的工作人员。她对东非大裂谷中部的湖盆进行了详尽的研究，其中大部分是与考古学家合作进行的。肯尼亚大裂谷内的奈瓦沙湖盆地有证据表明，该湖以前的水位远高于1972年的1890米。找到了这些证据，并进行了平整工作，以确定以前高湖岸线或岸线的高度。在海拔2006 ~ 2008 m处可能存在海滩山脊，在海拔1990 ~ 1996 m处，许多地方出现了黑曜岩、熔岩和浮石的海滩砾石。可以初步得出结论，该湖的最高水位为2000±10米。没有确凿的证据表明海岸线的水平面较低。目前，当这个盆地的一个上升的湖泊达到海拔1940-1950米时，它将向南流下恩约洛瓦峡谷：该地区的地形显然自20世纪70年代以来就开始下降。
Summary Dr. Celia Kamau is on the staff of Kenyatta University College, Nairobi. She has carried out exhaustive research on the lake basins of the central Rift Valley, much of it in association with archaeologists. The Lake Naivasha basin in the Kenya Rift Valley contains evidence that the lake has formerly stood well above its 1972 level of about 1890 m. This evidence was located and levelling was undertaken to determine the elevation of the former high lake shoreline or shorelines. A possible beach ridge was located at an elevation of 2006–2008 m, and beach gravels of obsidian, lava and pumice occurred at many localities up to a maximum of 1990–1996 m. It may tentatively be concluded that the lake rose to a maximum level of 2000±10 m. No conclusive proof of a lower shoreline level could be found. At present a rising lake in this basin would flow southwards down the Njorowa Gorge when it reached an elevation of 1940–1950 m: lowering of the terrain in this area has clearly taken place since the time of th...