- Metamorphic Rocks
- When under heat and pressure igneous rocks and sedimentary rocks change their form and more precious rocks are formed to be known as metamorphic rocks.
Examples:
★ Granite into granite gneiss.
★ Coal into slate.
★ Slate into schist.
★ Limestone into marble.
- When under heat and pressure igneous rocks and sedimentary rocks change their form and more precious rocks are formed to be known as metamorphic rocks.