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塔里木板块西南英吉莎县依格孜牙出露上泥盆统—下石炭统序列。克里塔格组下段以法门阶牙行刺Icriodus alternatus alternatus为特征,中段的Spathognathodus aciedentatus和Polygnathus inornatus属杜内阶上部,上段的Scaphignathus sp.大致相当于维宪阶,可能还包括部分谢尔普霍夫阶。岩相序列表明,从奇自拉夫组紫红色石英砂岩、含砾石英砂岩相变为克里塔格组台地浅海相碳酸盐岩指示一次海进过程,克里塔格组礁灰岩可视为大灭绝事件之后全球最早的珊瑚礁群落复苏代表实例之一。
Tarim plate southwestern Injea County, according to Engezi teeth exposed Devonian - Lower Carboniferous sequence. The lower Cretaceous group is characterized by Icriodus alternatus alternatus, the middle Spathognathodus aciedentatus and Polygnathus inornatus, belonging to the upper part of the Duaney order, and the upper Scaphignathus sp. . The lithofacies sequence indicates that a marine transgression process is indicated from the mafic quartz sandstone and pebbly quartz sandstones in the Chiracul Formation to the shallow marine carbonates in the Cretaceous platform. The reef limestone in the Cretaceous group can be visualized One of the earliest representatives of the recovery of the coral reef community in the world after the mass extinction event.