Abstract: The investigated area is located in an approximately east-west trended ophiolitic melange belt betweenDumanlı Dağı (Tokat) and Çeltek Dağı (Sivas). The Boztepe Formation of Upper Campanian to Paleocene age lieswith a local unconformity over the ophiolitic melange, forming the basement- This formation has been subdividedinto four members grading in one another- From bottom toward top, these are-. Yakaboyu Member which consistsof clastic rocks interbedded with pelagic limestone- Maden Member composed mostly of pelagic limestone; Yakupoğlan Member which is composed of sandstone, clay stone and rarely conglomerate and contains neritic fossils; ÇaltılıMember which is made up mostly of neritic carbonates. Olistostromes whose components have been derived fromthe underlying ophiolitic melange are abundant in the lower members in general. Lutetian elastics overlie theUpper Cretaceous rock assemblage with a regional angular unconformity.