Shale (noun)

A sedimentary rock formed from consolidated clay or mud, characterized by its fissility and thin layers.

Origin:

From old english scealu, from proto-germanic *skaljo.

Examples:

1. Shale is a common rock found in many parts of the world.
2. Shale is a sedimentary rock that is rich in fossils.
3. Shale is often used as a source of oil and natural gas.
4. The shale rock was drilled and extracted to extract the oil and natural gas.
5. The shale rock was used to make bricks for construction.