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CRETACEOUS RED PELAGIC CARBONATES OF NORTHERN TURKEY - THEIR PLACE IN THE OPENING HISTORY OF THE BLACK-SEA

1993    GORUR, N; TUYSUZ, O; AYKOL, A; SAKINC, M; YIGITBAS, E; AKKOK, R

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 behind a continental extensional margin magmatic arc. This was followed by a fault-controlled syn-rift sedimentation and subsidence until the late Cenomanain when sea-floor spreading in the basin and thermally-induced subsidence of the basin margins started.