Early Jurassic type of coal accumulation
Abstract
The geological and historical features of coal-bearing strata undoubtedly depend on the previous development of the face of the earth and on the nature of the movements at the corresponding time. In other words, they are a function of geotectonic and paleogeographic conditions. The multiple appearance of alluvial fans and proluvial, river-washed pebbles is especially characteristic only of the Lower Jurassic coal accumulation period in the USSR. The establishment of a special type of coal accumulation in the Lower Jurassic period in the Hercynian mountain country of Western Siberia, Kazakhstan and Central Asia is of great fundamental importance.
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