塔里木盆地东部白垩系划分为下白垩统卡普沙良群、巴什基奇克组及上白垩统古城组。依据地面剖面、井下地层、古生物资料研究，卡普沙良群时代为早白垩世早、中期，库车坳陷以南覆盖区的钻井剖面原划为中、上侏罗统的层位均属于卡普沙良群；巴什基奇克组时代为早白垩世晚期。古城组为作者新建，根据介形类、轮藻化石组合将其时代定为晚白垩世晚期 The Cretaceous in the eastern Tarim Basin is divided into the Lower Cretaceous Kapuzhale Group, the Bashijiqike Formation and the Upper Cretaceous Gucheng Formation. According to the ground profile, downhole stratum, palaeontological data, the Kapulcharian age is Early Early Cretaceous, middle period, and the drilling profile of the area south of the Kuqa Depression is zoned as middle and upper Jurassic. Pu Shaliang group; Bashijiqike era of Early Cretaceous. The ancient city group is the author of the new, according to the type of mesa, Chara fossil assemblage of its age as the late Late Cretaceous