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• Table 5. Average Profile Horizon Thicknesses, Bowie Area Mine <br />1--Aa: 0-I.5" <br />B,: 3.5"-27.7" <br />B,; 2.0-28.3" <br /> <br />C,: 19"-27" to Mancos Shale <br /> <br />6--A,: 0-1" <br /> <br />In all cases with the exception of areas represented by 4, the C horizon is very rocky material <br />(>504b) and is extremely variable with respect to depth. The rocky material is interspersed <br />with silty clay loam soil and is not worth salvaging. <br />The C horizon in area 4 is weathered shale and is not worth salvaging either. Realistically, the <br />areas represented by soils 1 and 2 would be the only practical salvagable soils. <br /> <br />