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CONTEMPRANEOUS DEFORMATION STRUCTURES IN VERMICULAR LIMESTONE

Qian Shourong (Geological Department of Huainan Mining Institute)  
In the vertnicular limestone of the Lower triassic in Lower Yangtze area , various contemporaneous deformation structures are well-devoloped. Their occrrence was related to the excess pore pressure in the vermicular limestone at the synsedimentary stage. Yhe above genetic mechanism suggests the vermicular limestone deposited at a high rate under the condition of high energy, and the bottom mold structures, hummocky cross-beddings and other sedi-mentary structures indieate that the sedimentation of this rock was concerned with storm. It is actually tempestite.
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