Storm deposits has been found for the first time in the 2nd member of Xujiahe Formation ( Upper Triassic) in western Sichuan Basin.Based on the micro-facies of cores

the main types of tempestite sedimentary characteristics have been identified

including gutter cast

scouring surface

truncated structure

storm lag deposit

hummocky cross-stratification

convoluted laminations

V-shaped structures generated by wave. A detailed study of sedimentary structures and petrological features of storm deposits has been made

such as individual laminates

thickness of storm deposit

and so on. The storm deposits are characterized by their lithologic features

and storm sedimentary sequence are related to storm activity and similar to the typical Bouma sequence.The sedimentary environment of tempestites is discussed

and the storm sedimentary model is explored.