Slate is formed by the metamorphism of which rock?

Correct answer: Shale. Slate is formed when shale is changed by low-grade metamorphism.

Background: Slate splits easily into thin sheets.

• Sandstone: Sandstone changes into quartzite.
• Limestone: Limestone changes into marble.
• Granite: Granite changes into gneiss.

Did you know? It is commonly used for roof tiles and blackboards.

Memory trick: Shale → Slate.