Wstępna charakterystyka mineralogiczna czarnych łupków antrakozjowych z obszaru synklinorium śródsudeckiego

Preliminary mineralogical characteristics of the Anthracosia Shales from the Intra-Sudetic Synclinorium. Prz. Geol., 69: 389-392; doi: 10.7306/2021.23 A b s t r a c t . Anthracosia Shales within the Pennsylvanian-Lower Permian continental succession from the Intra-Sudetic Synclinorium are lacustrine sediments, represented by black shales intercalated with sandstones/mudstones. Mineral composition of each lithology consists o f quartz, feldspar, mica, clay minerals (including kaolinite, the content o f which decreases upward the sec­ tion), and carbonates (calcite and siderite). The section is a continuous record of reduction and rise in terrigenous input. Mineral detritus is least weathered in the uppermost part of the Anthracosia Shales. The sedimentation occurred under dysoxic conditions that were ventilated by bottom currents.