Coastline
Coastal lakes are made almost parallel to the coast, where long, narrow sandbags are shallow at depths hundreds of meters or kilometers away from the coast. It is said that the coastal lakes are formed by piled up rocks on shallow continental shelf where the big blue starts to crumble. Large lakes are separated by lagoons, and lagoons form low - concentration brine or waters. If the lagoon is connected to the ocean, the lagoon will be buried rapidly by the sediment transported by the water in the coastal river, the sand blown by the wind in the coastal zone, and the sediment transported by the tide as time goes by. All three types of sediments contribute to the formation of tidelands at the edge of the lagoon. Unless strong tides or tidal currents flow through the estuaries formed in the coastal lakes to the ocean, most of the final destiny of the lagoon first turns into tidal flats and eventually turns into coastal wetlands.