which horizon contains the least weathered parent material
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The C horizon generally contains the least-weathered parent material, as it is composed of partially weathered rock fragments. This layer is located beneath the A and B horizons in the soil profile.
The C horizon typically contains parent rock material, which is the unweathered rock from which the soil has developed.
Partially weathered parent material is found in the C horizon of a soil profile.
The C Horizon contains large pieces of broken up bedrock. It is the layer of weathered parent material that lies below the A and E horizons in soil profiles.
The layers of soil are commonly referred to as horizons. The main layers are topsoil (A horizon), subsoil (B horizon), and parent material (C horizon). Topsoil is rich in organic matter and nutrients, subsoil contains less organic material and minerals, and parent material is the unweathered rock or sediment beneath.
The parent material horizon (C horizon) is typically the thickest soil horizon, as it consists of the unconsolidated material from which the soil develops over time. It is often the deepest layer and can vary greatly in thickness depending on the location and the type of parent material.