Sedimentary structures of the Upper Silurian siltstones in the Polish Lowland

Abstract

Data concerning the Upper Silurian siltstones in the Polish Lowland have been gained from deep boreholes. A report is here given of a detailed analysis of the sedimentary structures of these deposits. An attempt has been made to restore the mechanism of the formation of the silts tone beds and to determine the transport directions of the detrital material. The origin of the deposits here considered is also discussed and suggestions are made of the strong difficulties to determine whether their source areas lay in the orthogeosynclinal zone or within the craton.