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Silt (Substrate Subgroup)

Component: Substrate

Unique Identifier: 298

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

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