| Rating | Solver | Clue |
|---|---|---|
| OOLITE | Sedimentary rock | |
| CHALK | Sedimentary rock | |
| SHARE | Sedimentary rock | |
| SHALE | Sedimentary rock | |
| LIMESTONE | Sedimentary rock | |
| SANDSTONE | Sedimentary rock | |
| STRATUM | Layer of sedimentary rock | |
| LACCOLITH | A mass of igneous rock intruded between sedimentary beds and resulting in a mammiform bulging of the overlying strata. | |
| METAMORPHISM | ... process by which the material of rock masses has been more or less recrystallized by heat, pressure, etc., as in the change of sedimentary lime... | |