Northern Turkey forms a part of the Rhodope-Pontide Fragment, one of Turkey's main
tectono-stratigraphic units. Cretaceous geology of this region is characterized by the
presence of a series of horsts, grabens and tilted and rotated fault blocks buried beneath the
Upper Cretaceous to Lower Tertiary volcanic material-bearing turbiditic sediments. These
structures and sedimentary and igneous rocks represent the most complete record of the
opening of the oceanic Black Sea back-arc basin which began forming in the Aptian-Albian …