Originally posted by Tripmeup
View Post
![Big Grin](https://www.growfruitandveg.co.uk/grapevine/core/images/smilies/biggrin.gif)
"Slate is a fine-grained, foliated, homogeneous metamorphic rock derived from an original shale-type sedimentary rock composed of clay or volcanic ash through low-grade regional metamorphism. It is the finest grained foliated metamorphic rock"
Comment