{"thcode":62,"term":{"code":"SC-264","name":"Gravel","parent":"SC-263","scope":"Substrate Group: Geologic Substrate surface layer contains > 80% Gravel (particles 2 millimeters to < 4,096 millimeters diameter)."},"uf":[],"bt":[{"code":"SC-263","name":"Coarse Unconsolidated Substrate","parent":"SC-029","scope":"Substrate Subclass: Geologic Substrate surface layer contains > 5% Gravel (particles 2 millimeters to < 4,096 millimeters). These sediments are classified using the upper three rows of the Folk (1954) Gravel-Sand-Mud diagram."},{"code":"SC-029","name":"Unconsolidated Mineral Substrate","parent":"SC-025","scope":"Substrate Class: Geologic Substrates with less than 50% cover of Rock Substrate. ..."},{"code":"SC-025","name":"Geologic Substrate","parent":"SC-C003","scope":"Substrate Origin: Benthic substrates where percent cover of Rock and Unconsolidated Mineral Substrate exceeds percent cover of both Biogenic and Anthropogenic Substrates, considered separately. ..."},{"code":"SC-C003","name":"Substrate","parent":"root","scope":null},{"code":"root","name":"CMECS","parent":null,"scope":"Coastal and Marine Ecological Classification Standard: Category terms encompassing waters from the head of tide or inland incursion of ocean salinity to the splash zone of the coasts to the deepest portions of the oceans and the deep waters of the Great Lakes."}],"nt":[{"code":"SC-265","name":"Boulder","parent":"SC-264","scope":"Substrate Subgroup: Geologic Substrate contains > 80% Gravel, with a median Gravel size of 256 millimeters to < 4,096 millimeters."},{"code":"SC-266","name":"Cobble","parent":"SC-264","scope":"Substrate Subgroup: Geologic Substrate contains > 80% Gravel, with a median Gravel size of 64 millimeters to < 256 millimeters."},{"code":"SC-268","name":"Granule","parent":"SC-264","scope":"Substrate Subgroup: Geologic Substrate contains > 80% Gravel, with a median Gravel size of 2 millimeters to < 4 millimeters."},{"code":"SC-267","name":"Pebble","parent":"SC-264","scope":"Substrate Subgroup: Geologic Substrate contains > 80% Gravel, with a median Gravel size of 4 millimeters to < 64 millimeters."}],"rt":[]}