Answer | Crossword Clue |
---|---|
SLATE | Fine-grained rock |
BASALT | Fine-grained rock |
CHERT | Fine-grained rock |
BASALT | Fine-grained rock. |
SHALE | Fine-grained rock. |
SHALE | Fine-grained rock |
BASALT | Dark fine-grained rock. |
SHALE | Fine-grained sedimentary rock |
SLATY | Like a fine-grained rock |