Kierunki transportu materiału klastycznego w górnym karbonie Górnośląskiego Zagłębia Węglowego

Abstract

DIRECTIONS OF TRANSPORT OF THE CLASTIC MATERIAL IN THE UPPER CARBONIFEROUS OF THE SILESIAN COAL BASINThe Upper Carboniferous sandstones of the Silesian Coal Basin are very often cross-bedded. Both torrential and tangential types of cross-bedding are present, and each of them is·represented by a number of varieties. Following the terminology of McKee and Weir (1953) the authors distinguished the parallel torrential cross-stratification (ng. 1) and wedge-shaped torrential cross-stratification (Fig. 2). Parallel, wedge-shaped and trough cross-stratification varieties were distinguished within the tangential type of cross-stratification (Fig. 3, Fig. 4 and Fig. 5). The term “irregular current beddingˮ was, proposed by the authors (B. Gradziński, A. Radomski, R. Unrug 1959) for irregular current-bedded streaks occurring, within beds of fine-grained sandstones. This type of current bedding is also common in the Silesian Upper Carboniferous.