Optical age estimates for hyper-arid fluvial deposits at Homeb, Namibia

被引：24

作者：

Bourke, MC ^{[1
]}

Child, A ^{[1
]}

Stokes, S ^{[1
]}

机构：

[1] Univ Oxford, Sch Geog & Environm, Oxford OX1 3TB, England

来源：

QUATERNARY SCIENCE REVIEWS | 2003年 / 22卷 / 10-13期

关键词：

D O I：

10.1016/S0277-3791(03)00085-4

中图分类号：

P9 [自然地理学];

学科分类号：

0705 ; 070501 ;

摘要：

Two 25 m sequences of slack water facies sediments have been dated in the Kuiseb River in Namibia by optical dating of sand-sized quartz grains. The eight samples indicate the sediments were deposited between 6.3 and 9.8 ka. This revises previous age estimates for the Homeb Silts. According to our criteria, six out of eight samples displayed characteristics of partial bleaching. This result was not unexpected as arid fluvial systems have high suspended sediment concentrations, short flow durations and a tendency for flow peaks to occur at night. (C) 2003 Elsevier Science Ltd. All rights reserved.

引用

页码：1099 / 1103

页数：5

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