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Sandstones and conglomerates Peruc Mbrs (lower Cenomanian , Upper Cretaceous ) of eastern Bohemia and coal mass in them
 Martinec, Petr ; Kubina, Lukáš ; Rojáková, T.
A reasonably complete knowledge of the development of East Bohemia’s Lower Cenomanian sediments (Peruc Mbr) is still lacking. The sediments originate from rivers flowing from the buried Hořice-Nové Město elevation to Moravia in the SE direction, via a flatland depression. The sandstone and conglomerate bodies within the Litice Chlum area under investigation are channel river sediments accompanied by sedimentation in river lakes or oxbow lakes. The landscape of the region showed the character of a low-relief peneplain. At Sopotnice site, the surface of Litice kaolinite massif of granodiorite with a weathered crust incorporates fine-grained conglomerates with white quartz and quartzite pebbles in a sandy matrix. They form wedge-shaped channel bodies of several dozens centimeters thickness. The textures are massive, with inconspicuous positive gradation bedding of medium to poor bed sorting. By their character they correspond to the fill of an instable riverbed that kept changing its position in the flatlands. In the matrix, kaolinite dominates over illite.
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Plný tet: UGN_0398209 - Download fulltextDOC
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