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. |