Sedimentary facies of tidal flat indicate that coastal environment is characterized by gentle coastal slope, predominant tidal dynamics, and with plenty of fine grain (silt) sediment supply. The comparative study of sedimentary facies has shown high level agreement between present tidal flat and ancient fine textural sedimentary rocks of the middle Triassic Huangmaqing Formation in Purple Mountain of Nanjing, and Zhanjiang Formation of early Pleistocene Period in Haikou. Besides the similarity in nature of ...