Flysch from Postojna

Abstract

During excavation for the foundation of a sports building in Postojna, a section of flysch conglomerate and breccia was exposed. Both less rounded and angular fragments from a few cm to 100 cm in diameter are cemented together in a sandy and marly matrix. The largest block exceeds 100 cm. Among fragments prevail those derived from miliolid and alveolinid-nummulitic limestone. By different nummulitine shells, obtained from the conglomerate matrix, Middle Cuisian age of the Postojna flysch is indicated.