Question

Which one of the following is not included in Regolith?

• A. A-horizons
• B. B-horizons
• C. C-horizons
• D. Bed Rock

Hint:

Regolith includes soil horizons and weathered material above bedrock. Bedrock itself is not included in regolith.

Answer 1

The Correct Option is D

Concept:
Regolith is the unconsolidated material lying above the hard bedrock. It includes soil horizons and weathered parent material.

Step 1: Understand regolith.
Regolith includes loose and weathered material present above solid rock.

Step 2: Check A-horizon.
A-horizon is the top mineral soil layer and is part of regolith. \[ A \text{ is included} \]

Step 3: Check B-horizon.
B-horizon is the subsoil zone and is also included in regolith. \[ B \text{ is included} \]

Step 4: Check C-horizon.
C-horizon is weathered parent material and is included in regolith. \[ C \text{ is included} \]

Step 5: Check bed rock.
Bed rock is the hard solid rock below regolith. It is not considered a part of regolith. \[ D \text{ is not included} \] \[ \therefore \text{Correct Answer is (D)} \]