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Silt-Clay (Substrate Subgroup)

Component: Substrate

Unique Identifier: 299

Substrate Origin Geologic Substrate
Substrate Class Unconsolidated Mineral Substrate
Substrate Subclass Fine Unconsolidated Substrate
Substrate Group Mud
Substrate Subgroup Silt-Clay

Definition Geologic Substrate surface layer shows no trace of Gravel and contains < 10% Sand; the remaining Silt-Clay mix is < 33% to 67% Silt.