Analiza petrograficzna piaskowca retu z Jarug pod Ostrowcem Świętokrzyskim

Abstract

PETROGRAPHICAL ANALYSIS OF THE ROETHIAN SANDSTONE FROM JARUGI NEAR OSTROWIEC ŚWIĘTOKRZYSKIIn a small quarry situated in the Kamionka River valley at the village Jaruga, near Ostrowiec Świętokrzyski, W. Karaszewiski (1966) has found animal tracks on a sandstone slab (sample Nr 1; Table I, Fig. 1), and some dragging traces (sample Nr 2; Table I, Fig. 2). Both samples handed over by W. Karaszewski and determined by him as Roethian, I examined under the microscope and binocular microscope.Sample Nr 1 represents fine-grained sandstone, quartzous and feebly sized, with clayey cement containing iron hydroxides and leucoxene. According to the classification by L. A. Rauchin (1953) the granularity of the sandstone shows that this represents a fluvial deposit. X-ray analysis shows that day minerals are represented by illite and kaolinite, the former prevailing over the kaolinite.Sample Nr 2 is mudstone-like sandstone of quartzous nature with clayey cement (illite, kaolinite), also with iron hydroxide and leucoxene. The results of the petrographical examinations do not define the opinion upon the sedimentary conditions of the deposits discussed, although they confirm the conclusions drawn by W. Karaszewski (1966).