A New Sedimentary Structure——Similar Herringbone Cross-Bedding

Herringbone cross-bedding is often found in coastal lake environment.It is composed of two laminas with inverse inclination.The interlayer is absent between the laminas.One kind of similar sedimentary structure was found in the second sub-group of Xiangshan group in Ningxia by the writers,in which a large scale interlayer exists between the laminas.The previous researchers believed that this set of formation is mainly formed in turbidity current setting.However,it is far from the sedimentary setting of the herringbone cross-bedding.This paper calls it similar herringbone cross-bedding.It seems that the internal wave sedimentation theory can only be used to satisfactorily explain the special sedimentary phenomena formed by traction current in deep water setting.