Examples of metamorphic rocks include marble, which originates from limestone and slate, which originates from clay. Slate is dark grey/green in colour and can be split into thin layers for use as ...

No matter where it's from, all slate is a type of natural stone (or, more precisely, metamorphic rock) dug up from the earth.

Basalt rock comprises most of County Antrim’s geological map, while sandstone and slate comprise most of ... pushed together to form a new material. Metamorphic rocks are also formed because ...