Abstract: The studied area lies between Tokat and Sivas (Yıldızeli, Karaçayır). The rocks taking place at thenorthern part of the area are mainly made of greenish shists and crystallized limestone blocks which some of themPermian aged. Metamorphic rocks outcrops at the south and they are made of two layers; calcschist interbedded withgreenish schist and marble is overlain by quartzite.Ophiolitic melange of east-west trend takes place between the units described above. Ophiolitik melange is madeof a matrix is formed of tuff, agglomerate and mainly serpantinite and having lots of shear fracture; marble, phyllite,cyristaliized limestone, radiolarite, sedimentary rocks of Upper Jurassic-Lower Cretaceous age interval, pelajik limestone of Cenomanian age, peridotite (generally werlite), gabbro, diabase blocks with in the matrix.Upper Cenonian limestone unit including olisthostromes belonging to the ophiolitic melange overlies on the ophioliticmelange unconformably at the north. According to these data, it could be concluded that the ophiolitic melangeemplaced between Cenomanien and Ltower Cenonian.Metamorphits at the south around Karaçayır and ophiolitic melange are cut by granodiorite.Eocene aged conglomerate, sandstone and argillastone alternation overlies the ophiolitic melange with an unconformity at the north. Conglomerate, limestone, sandstone and arglEastone layers generally containing Upper Cretaceousaged blocks are underlain by metamorphites unconformably around Karaçayır.Neogene units are continental and they overlies all other units unconformably.