| Answer | Crossword Clue |
|---|---|
| bedrock | continuous solid rock under soil |
| bedrocks | Solid rock underlying loose deposits such as soil or alluvium |
| underlying | (esp. of a layer of rock or soil) Lie or be situated under (something) |
| underlies | (esp. of a layer of rock or soil) Lie or be situated under (something) |
| underlain | (esp. of a layer of rock or soil) Lie or be situated under (something) |
