In upper Yangtze Region, laminated microcrystalline limestone, calcareous shale or ribbon limestone widely developed during the earliest stage of Early Triassic time, just after the Permian Triassic boundary (PTB) mass extinction, which represented the Sluggish oceanic circulation. As seen at the sections in Jiangyou, Guangyuan, Wangcang County, Sichuan Province and Chongqing Municipality, the stormrelated sediments such as brecciform limestone, flatpebble conglomerate calcirudyte, hummocky crossbedding grain limestone, ripple bedding siltstone uplaped on the laminated or ribbon deposits. Erosion surfaces were usually seen between the lowenergy deposits and the stormrelated turbulent oceanic deposits, which indicated the unusual paleooceanographical and paleoclimate changes during the earliest stage of Early Triassic interval. As a main type of Early Triassic anachronistic facies which showed the turbulent oceanic conditions, brecciform limestone and flatpebble conglomerate calcirudyte were widely seen in the northwestern part of upper Yangtze Region. It was considered that the PTB event dramatically affected the Early Triassic paleoclimate and atmospheric circulation. After the PTB mass extinction, the moderating effect caused by creature fell off and extreme palaeoenvironment and paleoclimate reigned over the Earth.