Abstract: There is a unique succession of tempestite, with typical geological characteristics and special sedimentary sequence, from the Lower Cambrian Qingxudong Formation of Yutang area in northwestern of Hunan Province. Erosional bases at the tempestite sequences are clear. Thickness variation of each section is great, grain size of clastic sediments is finingupward. Superposed hummocky cross-lamination, parallel bedding and ripple-bedding are common. All of these features indicate sedimentation in an offshore environment. The succession of tempestite had important fundamental implication for us to creat sedimentological section and proble into the space variation characteristics of tempestite sedimentary pattern and make sure metallogenical environment or metallogenical geological characteristics.

Key words: northwestern of Hunan Province, Cambrian, Yutang area, tempestite, Qingxudong Formation