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Coal tonstein of the Otakar (485) coal seam, the Poruba Mdr , the Ostrava Fm - The Czech part of the Upper Silesian Coal Basin
Martinec, Petr ; Hloch, I. ; Smutný, Z.
A new finding of coal tonstein in coal seam Otakar (no. 485) is described in the paper. This tonstein was found in Poruba Mbr, Ostrava Fm (Lower Carboniferous, Arnsbergian, E2b) in the Czech part of the Upper Silesian Cal Basin. Volcanoclastic minerals: quartz, sanidine, mica; authigenic minerals: several forms of kaolinite (vermiform, pseudomorphoses after sanidine and micas), illite-smecite miw - layered structures.
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