PRECAMBRIAN-QUESTIONABLE AND CAMBRIAN STRATIGRAPHY OF THE PENBEGLI-TUT INLIER, SOUTHEASTERN TURKEY

The oldest rocks in the Penbegli-Tut inlier of southeastern Turkey bel ong to the Meryemusagi Formation (base not seen); they are mostly elas tic rocks of ?late Precambrian age, overlain with angular unconformity by unfossiliferous quartzites (270 m est.) of the Zabuk Formation. Th e latter unit is succeeded conformably by the Koruk Formation (Lower?/ Middle Cambrian), comprising almost 200 m of dolomite and grey and red nodular Limestone, and the Sosink Formation (Middle Cambrian), about 600 m of silty mudstone and sandstone with a few thin limestone beds, overlain unconformably by Cretaceous carbonates. The closest compariso n is with the Derik-Mardin area, 220 km to the east, where the section is more complete. The upper Koruk Formation contains trilobites of th e Pardailhania and Solenopleuropsis biozones; trilobites from the Sosi nk Formation indicate the Solenopleuropsis Biozone, a post-Solenopleur opsis interval, and a level with Holasaphus mesopotamicus, known only from the Derik area. Acritarchs from the highest Koruk Formation and t he whole of the Sosink belong to the lower part of microflora A2, desc ribed from the Middle Cambrian of eastern Newfoundland.