On the Origin of the Oklad Breccia on the Island of Brac (Southern Croatia)

Abstract

The Oklad carbonate polymictic breccia from Novo Selo on the island of Brac is a product of the partial destruction of Upper Cretaceous deposits during the Maastrichtian. From a comparison of the lithostratigraphic units of the Upper Cretaceous with the textural and structural features of breccia, it is possible to determine the palaeomorphological pattern of its origin. At the end of the Maastrichtian plicative and disjunctive deformation took place on this part of the Adriatic carbonate platform, resulting in a steep palaeorelief, adequate for formation of the breccia.