通过共和盆地西北部晚新生代地层的野外地质调查，发现上新世地层中存在一期角度不整合面。
An angular unconformity within the Pliocene stratum was found during field exploration in northwestern part of the Gonghe Basin.
地表地质调查和人工地震勘探结果证实，石炭纪以来最早的区域性角度不整合发育于白垩系与前白垩纪地层之间。
Field surveys and seismic exploration show that the lowest regional angular unconformity older than the Carboniferous developed between the Cretaceous and the pre-Cretaceous strata.
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