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皖北夹沟唐山子的岩层界面横向追踪及地层工作结果,显示该地点所存在的上前寒武系倪园组(非礁相岩层)的下部与赵圩组(叠层石礁相岩层)的下部为先后关系,而与赵圩组的中上部为同时不同沉积相的沉积。倪园组与赵圩组为部分同期异相的地层关系是目前所建立的皖北上前寒武系地层层序中尚未显示的。同期异相的相变现象在前寒武系的地层学研究中应受到充分的重视。
The tracing and stratigraphic tracing results of the Tangshanzi interface in the northern Jiaogou show that the lower part of the Upper Precambrian Niyuan Formation (non-reef-facies rock formation) and the Zhao-Wei formation (superimposed rock reef-facies rock formation) Of the lower part of the relationship between, and with the Zhao Wei Formation in the upper part of the deposition of different sedimentary facies at the same time. The stratigraphic relationship between the Niyuan Group and the Zhaowei Formation, which is partly out of phase with the same period, has not been shown in the sequence of the Precambrian strata in the northern part of Anhui Province. In the same period, the out-of-phase phase change should be given full attention in the study of the Precambrian stratigraphy.