1.

The ---- consist of weathered rocks from A and B horizon.​

Answer»

Topsoil (A horizon) is a combination of rock, sand, SILT, ORGANIC matter, AIR and water. It is rich with biological activity. Subsoil (B horizon) USUALLY consists of clay, and other particles washed down from the topsoil, but little humus. Parent Material (C horizon) CONTAINS only partly weathered bedrock.



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