diaokouhe river is one of the old courses of the yellow river into the sea before 1976 and its estuarine delta is an im- portent part of the yellow river delta national nature reserve.
刁口河是黄河1976年以前的入海故道,其河口三角洲是山东黄河三角洲国家级自然保护区的重要组成部分。
the early to middle jurassic coal-bearing deposition is mainly consisted of fluvial or lakeshore, estuarine delta facies, lacustrine facies and slough facies.