MODERN TIDAL CHANNELS SEDIMENTATION IN JIANGGANG, NORTH JIANGSU PROVINCE

The Jianggang tidal flat is formed under the influence ot two strong tidal currents which converge on or diverge from Jianggang.Tidal channel and creek system is rather well developed here due to the actions of scouring,transportation as well as deposition of bottom sediments by tidal currents.Tidal channels,crisscrossing the flat,are large in scale and swift in lateral migration,which plays a role of vital importance in the reworking of the tidal flat sediments.This paper evaluates the characteristics of sediments of the tidal channels and puts forward some facies criteria for the identification of these sediments and the theory of development of tidal channels by stages,thus providing a useful base for the study of its ancient counterparts.