UTWORY JURY ŚRODKOWEJ I ?DOLNEJ W REJONIE KSIĘŻPOL–LUBACZÓW (SE POLSKA) (z 21 fig.)

Abstract

MIDDLE AND ?LOWER JURASSIC DEPOSITS IN THE KSIĘŻPOL–LUBACZÓW AREA (SE POLAND) (with 21 Figs.)Abstract. In the Early and Middle Jurassic, the area of Księżpol–Lubaczów constituted the northern margin of the eastern continuation of the Mid-Polish Trough. Middle and probably Lower Jurassic deposits consist of clastic rocks, approximately 400 metres thick. In its lowermost part, the thin (ca. 20 m thick) clay-sandy series is considered to be of Early Jurassic age. The basal layer of the Middle Jurassic lithostratigraphic succession consists of sandstones, whose age was established as Aalenian–early Kuiavian. The upper layers of the succession are composed of clayey and muddy sediments with sandstone intercalations, representing the middle and upper Kuiavian, Bathonian and Callovian. The present study focuses on the Middle Jurassic deposits as well as the tectonic, structural and palaeogeographic problems of the area. Moreover, a comparison is made of the discussed sediments and stratigraphic index-fossils with those of the neighbouring regions.