|MadSci Network: Earth Sciences|
Hello and sorry about the delay The question came in the middle of final exams here and I left immediately afterwards, but now I am back to work and answering your question is on the top of my list! Weathering occurs in several ways physical and chemical and biological Physical weathering occurs due to hot-cold, wet-dry, shrink-swell, and related physical processes. The net result is usally a fragmentation of particles. Chemical weathering occurs by such things as oxidation (rusting is an example). biological weathering is caused by living organisms, but is realy a combination of the other two. Now as to your question. When landslsides occur they often expose soil or other substances that were previously buried. The buried sediments, rocks and other stuff was protected from both chemical and physical weathering. After the landslide they are exposed to new and variable conditions which favor weathering interesting phots of weathering: http://www.geo.duke.edu/geo41/wea.htm some terms http://bellnet.tamu.edu/res_grid/cuedwe17.htm
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