Mario Pleničar

Late Maastrichtian Rudists and microfossils in the Karst Region (NE Italy and Slovenia)

The late Maastrichtian deposits of the Padriciano and Dolenja Vas sequences are mainly characterizedby limestones of restricted and very restricted settings. These limestenes present a monospecific or oligospecific rudist fauna characterized by Apricardia specimens and the Bournonia-Apricardia assemblage, respectively. The Maasurichtian beds of Padriciano and Dolenja Vas are capped by a “breccia” at the K/T boundary, which records the decline of the rudists and other Cretaceous taxa such as the foraminifers Fleuryana adriaticaDe Castro, Drobne & CusicKhapydionina liburnica (Stache), Cuneolina ketiniInan and Cuneolina cylindricaHenson.

Rudists and Larger Foraminifera below the Cretaceous-Tertiary Boundary in the Dolenja Vas Section

The Vreme beds are part of the Liburnian Formation. At Dolenja vas which is situated on the Trieste-Komen platform, the Upper Maastrichtian age has been proved with co-occurring rudistids and foraminifera.