C horizon
Quick Summary
The C horizon is a soil layer found beneath the B horizon. It primarily consists of parent rock material that is more or less weathered. This layer is characterized by little to no accumulation of humus or development of soil structure. The C horizon often represents the unconsolidated material from which the upper soil layers (A and B horizons) have formed. It can be either relatively unweathered or deeply weathered. In contrast to the A and B horizons, which show distinct features due to soil-forming processes like humus accumulation and clay deposition, the C horizon is simpler in composition.123
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