Abstract
The mangrove ecosystem and the deposit are developing only upper half of the tidal zone. The ecosystem is stretching like a narrow green belt surrounding the tropical to sub tropical coast. The sediment has the following characteristics:
1. The sediment might be formed up as the results of interaction of not only fluvial and marine process but also the biomass accumulation and bioturbation processes.
2. The organic to peaty material is a distinctive indicator of the sea-level change and the history of mangrove forest.
3. The inner structure of mangrove forest is categorized into three zones. Zone 1 is located near the mean tide level formed by tidal and fluvial process. Zone 2 is formed by man grove organics accumulation and bioturbation which is developing between the mean to mean high water level. Zone 3 is developing between the mean high and the highest high water level that is formed by the process of mudlobster bioturbati on and weak tidal water movement. These three zones develop the remarkable sediment.
