Stylolity w skałach węglanowych cyklotemu Werra w okolicach Lubina (monoklina przedsudecka)

Abstract

Stylolites in carbonate rocks of the Werra Cyclothem in the area of Lublin (Fore-Sudetic Monocline) The stylolites described in this paper were observed in cores from bore-holes drilled in the area of Lubin (Fig. 1). Stylolites and microstylolites presented in Plate XVI, Fig. 1 and 2, are horizontal or inclined, and the amplitude of the indentations range from a few mm to a few cm (Palte XVII, Fig. 1). In Plate XVI, Fig. 1 a younger vertical stylolite cuts across the horizontal and inclined ones which are older. A large stylolite with distinct througihs and highs on which smaller indentations are superposed, is presented in Plate XVII, Fig. 1. The stylolite surfaces are coated with clay and/or by gypsum and gelenite. The latter are occurring also in numerous cracks and lenses. A stylolite surface with a clay coating is shown in Plate XIX, Fig. 1. The microstyloiites and stylolites shown in Plate XVI and Plate XVII, and in Plate XIX, Fig. 1, were formed probably by pressure solution. The occurrence of gypsum and galenite is probably related with hydrothermal processes active after the formation of stylolites. Columnar stylolites are shown in Plate XVIII, Fig. 1 and Fig. 2. The throughs and highs show no indentation. Black clay with a thin streak of fibrous gypsum occurs on the stylolite surfaces. The gypsum is younger than the stylolites. Pseudostylolites coated with black clay and grey fibrous gypsum are present in the specimen shown in Plate XIX, Fig. 2. It seems probable that the pseudostylolites and the columnar stylolites were formed during sedimentation by way of erosion or submarine solution.