Terrigenous Sedimentation in Arid Zones and its Features
The concept of “deposits of arid zones” is generally associated with the idea of saline rocks, forming from more or less mineralized waters. This view is valid only in part. In regions of arid steppes, semi-deserts, and deserts, sediments that formed in essentially fresh or in but slightly mineralized water (from parts of a percent to 4-4.5%) are widespread at the present time. These include deluvium, proluvium, alluvium, and the sediments of many lakes and seas (Caspian, Aral, Balkhash, Issyk-Kul, and others). Fossil analogues of these are known from many stratigraphic horizons and regions (Upper Permian red beds of the Russian platform, the Middle and Upper Devonian rocks of the principal Devonian area, and others).
KeywordsArid Region Arid Zone Clastic Rock Eolian Sand Humid Region
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