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Shell Hash (Substrate Subclass)

Component: Substrate

Unique Identifier: 321

Substrate Origin Biogenic Substrate
Substrate Class Shell Substrate
Substrate Subclass Shell Hash
Substrate Group Clam Hash
Crepidula Hash
Mussel Hash
Oyster Hash

Definition Surface substrate layers are dominated by loose shell accumulations with a median particle size of 2 millimeters to < 64 millimeters (Granules and Pebbles). Shells may be broken or whole. The presence of Shell Hash is noted in this subclass (and in the following groups). The presence of living organisms is described in the BC.