Vol 29, (1989)
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- Category: Vol 29, (1989)
Authors: Arnošt Dudek & Jiří Pešek
Full version (24,075 kB)Abstract: The Permo-Carboniferous coal basins of Czechoslovakia are situated, except for one insignificant occurrence, in the regions of Bohemia and Moravia. The most important is the paralic-limnic Upper Silesian Basin, which developed in the Upper Silesian Foredeep and the adjacent platform. All other basins are limnic origin. They were forming inside the megablock of the Bohemian Massif in the post-geosynclinal stage when a morphologically dissected dry land originated from the greater part of the Hercynides as a result of uparching. The origin of the limnic basins dates from two periods. The first is the Namurian-Westphalian boundary interval to upper Westphalian; at that time most basins of rather isometric shape were formed. The second period is the upper Stephanian - Lower Permian interval, when mainly linearly elongated basins-called Furrows developed. The foundation of most limnic basins was predisposed by the activity, viz, re-activity of deep-seated faults. A characteristic feature is a successive extension of basins and linking of originally isolated sedimentary centers into a coherent basin filling, In the evolution of the character and coalification of the basins both diastrophic and climatic factors took part. The variation of the sedimentary filling was also influenced by the synsedimentary activity of faults, volcanic centers and some agents of local importance. These involves, among others, differences in the geological structure and type of rocks that build up the basement of these basins.
