C Horizon
The soil horizon at the bottom of the solum; immediately beneath the B horizon. This horizon is realtively unaffected by biological activity and lacks the charcteristics of A and B horizons. Charactersitics usually designated by a subscript e.g. Cca - contains accumulation of calcium and magnesium carbonates.
âLayers below the B horizon which may be weathered, consolidated or unconsolidated parent material little affected by biological soil-forming processes.