| Answer | Crossword Clue |
|---|---|
| pelites | any clayey rock, as mudstone or shale |
| pelitic | any clayey rock, as mudstone or shale |
| pelite | any clayey rock, as mudstone or shale |
| mudstone | clayey rock with the texture and composition of shale but little or no lamination |
| slates | dense fine-grained metamorphic rock produced by the compression of various sediments (as clay or shale) so as to develop a characteristic cleavage |
| slate | dense fine-grained metamorphic rock produced by the compression of various sediments (as clay or shale) so as to develop a characteristic cleavage |
