Related Clues:
- Geological layers
- Social divisions in India
- Layers in beds
- Bed layers?
- Sedimentary rock beds
- Rock formations
- Shale features
- Geologist's layers
- Hindu social divisions
- Hindu social divisions or classes
- Tiers of thicknesses
- Parallel layers
- Layers as of rocks in earth's crust
- Layers or thicknesses of earth
- Layers of rock in earth's crust