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

Description

Definition

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