期刊
EARTH SURFACE PROCESSES AND LANDFORMS
卷 29, 期 12, 页码 1473-1485出版社
JOHN WILEY & SONS LTD
DOI: 10.1002/esp.1134
关键词
rock slopes; sandstone geomorphology; biological protection
On Cambrian and Ordovician sandstone inselbergs at Al-Quwayra in southern Jordan, many near-vertical rock walls exhibit marked case hardening. Detailed examination of the case-hardened layer from four sites on both red and white sandstones has been carried out using Schmidt hammer, simple chemical analyses, scanning electron microscopy, energy dispersive spectroscopy and inductively coupled plasma mass spectrometry. These analyses reveal a range of types of case hardening, often in association with cryptoendolithic biofilms containing cyanobacteria and fungi. Iron, manganese and calcium are all found to be common constituents of cements within the case-hardened layer. Micro-organic biofilms may assist in the formation of case hardening through aiding cementation, but are by no means a necessary component of all the hardened layers in the Wadi Rum area. Copyright (C) 2004 John Wiley Sons, Ltd.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据