It is pointed out that there exist the facies changes, rock unit diachroneity and discontinuity of interior formations in Ordovician.

分别对各构造单元内部及全盆地奥陶系各地层单元进行对比；指出盆地内存在相带变化、奥陶系内部地层间断等问题。

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In addition, the application of the theory of tectonic diachroneity to dating, and some problems concerning both indirect inference and comprehensive comfirmation methods are discussed.

最后，就间接推断法和综合印证法的有关问题进行了简单述评。

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