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Crepidula Rubble (Substrate Group)

Component: Substrate

Unique Identifier: 341

Substrate Origin Biogenic Substrate
Substrate Class Shell Substrate
Substrate Subclass Shell Rubble
Substrate Group Crepidula Rubble

Definition Shell Rubble (median particle sizes from 64 millimeters to < 4,096 millimeters) that is primarily composed of conglomerated Crepidula shells. While Crepidula are slowly mobile and do not cement their shells, the gregarious settlement of their larvae on conspecifics (Zhao and Qian 2002) can lead to very dense accumulations as live shells build over dead shells, and sediments fill in to bind these areas into flat shelly masses.