Organic silts and OL organic silty clays of low plasticity Inorganic silts, micaceous or MH diatomaceous fine sands or silts, elastic silts Silts and Clays Liquid Limit Inorganic clays or high CH greater than 50% plasticity, fat clays Organic clays of OH medium to high plasticity Peat, muck, and other PT Highly Organic highly organic soils Prefix: G = Gravel, S = Sand, M = Silt, C = Clay, O = Organic Suffix: W = Well Graded, P = Poorly Graded, M = Silty, L = Clay, LL < 50%, H = Clay, LL > 50%
OL Organic silts and organic silty clays of low plasticity Silts and Clays Liquid Limit greater than 50% MH Inorganic silts, micaceous or diatomaceous fine sands or silts, elastic silts CH Inorganic clays or high plasticity, fat clays OH Organic clays of medium to high plasticity Highly Organic PT Peat, muck, and other highly organic soils Prefix: G = Gravel, S = Sand, M = Silt, C = Clay, O = Organic Suffix: W = Well Graded, P = Poorly Graded, M = Silty, L = Clay, LL < 50%, H = Clay, LL > 50%
ASTM%20Terminology.docx