Intertidal and subtidal sediment biotopes may cover very extensive areas of shore or seabed.
Yield of fine sand from erosion of the Eocene cliffs has created a wide sandy intertidal foreshore.
A series of shallow basins connected to the sea by shallow, sometimes intertidal, sills.
Habitats include estuaries, large shallow inlets and bays, subtidal sandbanks, saltmarshes, intertidal mudflats and sand flats.
This information needs supplementary data, but suggests a possible storage volume of intertidal sediment of between 55 and 400 x 106m 3.