Slate is the protolith of phyllite.
| Rock group | Metamorphic |
| Metamorphism type | Regional |
| Metamorphic rock class | Pelitic Marl |
| Protolith | Shale |
Slate in Hand Sample
Two samples of Chancellor Formation slate
Red slate with reduction spots
Limy slate
Slate in Thin Section
Slate, plane polars
Slate, crossed polars
Slate bearing andalusite, plane polars
Slate bearing andalusite, crossed polars
