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本文论述了在中国首次发现的内潮汐沉积的特征及其形成环境。该内潮汐沉积发现于浙江省桐庐县桐君山地区上奥陶统上部，具有典型的对偶层双向递交层序。据其岩类组合和层序特征，可将其定为韵律性砂泥岩薄互层相。其中发育有特征的脉状、波状和透镜状层理。其沉积特征表明形成于开阔的深水斜坡环境，这种对偶层双向递交层序可能为内潮汐的大潮和小潮周期性变化的结果。
This article discusses the characteristics and formation environment of the tidal sediments first discovered in China. The internal tide deposition was found in the upper part of the Upper Ordovician in the Tongjun Mountain area, Tonglu County, Zhejiang Province. It has a typical dual-layer dual-layer sequence. According to their rock assemblages and sequence features, they can be defined as rhythmic sand-shale thin interbedded facies. Among them are characteristic vein, wavy and lenticular bedding. Its sedimentary features indicate that it is formed in the open deepwater slope environment. The double layer sequence of dual layer of dual layer may be the result of tidal tide and periodic change of small tide.