The section of the soil profile that lies directly above bedrock is called the C horizon.

Here's a breakdown of the soil profile:

* O horizon: The uppermost layer, composed of organic matter like leaves and decomposing plant material.

* A horizon: The topsoil, rich in organic matter and minerals.

* B horizon: The subsoil, characterized by accumulation of minerals leached from the A horizon.

* C horizon: The layer directly above bedrock, composed of partially weathered bedrock and parent material.

* R horizon: The bedrock itself.

The C horizon is important because it represents the transition zone between the soil and the underlying bedrock. It's less fertile than the A and B horizons, but it's still an important part of the soil profile.