SEARCH RESULTS
| Term | Description |
|---|---|
| Slate | A hard, brittle metamorphic rock consisting mainly of clay minerals used extensively as dimensional stone for steep roofing and in granular form as surfacing on some other roofing materials. |
| Term | Description |
|---|---|
| Slate | A hard, brittle metamorphic rock consisting mainly of clay minerals used extensively as dimensional stone for steep roofing and in granular form as surfacing on some other roofing materials. |