information on the biology of species and the ecology of habitats found around the coasts and seas of the British Isles

Sediment types

Marine sediment types

The seabed sediment classification developed by for the MESH and UKSeaMap projects (Long, 2006). It is based on the Folk classification (1954) used to classify marine sediments by the British Geological Survey (BGS).  


Sediment types, Long 2006


Folk, R.L., 1954. The distinction between grain size and mineral composition in sedimentaryrock nomenclature. The Journal of Geology, 62, 344-359.

Long, D., 2006. BGS detailed explanation of seabed sediment modified Folk classification. Available from: