Uwagi o pozycji anhydrytów polskiego Przedgórza Karpat środkowych

Abstract

REMARKS ON POSITION OF ANHYDRITES FROM THE POLISH PIEDMONT AREA OF THE MIDDLE CARPATHIANS Summary In the light of strongly developing reconaissance of the piedmont area, carried on by means of geophysical surveys and drillings, the Miocene deposits, particularly the anhydrites proved to be a very good index of fundamental structural changes, to which the piedmont area was subject during the later phase of the Alpine orogeny. Due to the extension and characters of the saline formations the piedmont area may be subdivided into three zones: central zone stretching between the forks of both Vistula and San rivers, southern near-Carpathian zone and northern zone. The central zone is characteristic of an uniform profile of the lower and upper Tortonian and Sarmatian deposits. The near-Carpathian southern zone, stretching from Wieliczka, through Bochnia as far as Wola Pogórska, is characterized by a more complete development of the saline formations, the prolongation of which should be expected beneath the Carpathians, as well as by its greater degree of disturbance. From Sędziszów to Jarosław, the zone lacks the saline formations and therefore this area is named the Rzeszów island. From the Żegociny meridian, up to the Jarosław meridian, there are known formations of the same age as that of the anhydrites and Baranów beds, resting on the Carpathian flysch. In the northern zone of the area in question, the anhydrites wedge out on dislocations and pass into the Ratyń limestones and the organogenic-detrital marginal facies.