Abstract:

Storm deposits were discovered in the lower submember of the first member of the Lower Cretaceous Tenggar Formation. The sedimentary sequences in ascending order are:1. Sharp basal boundary with scour-and-fill structure; 2. Basal lag section; 3. Large current-bedding section; 4. Hummocky cross-stratification section; 5. Ripple bedding section; 6. Bioturbate section. Based on these features, the tempestites were originated by stir-mix and the main properties are:1. Having no unidirectional basal casts; 2. The fabric characteristics formed by oscillation and multidirectional currents in basal clastic rock section; 3. Lacking parallel stratification and developing hummocky cross-sttatification and current bedding. According to the sequence differentiae and the distfibution localities, the storm deposits can be divided into nearshore (coarse) type and offshore (fine) type.