2.1.7. Metamorphic rock is (very / not very) resistant to erosion. 2.1.8. Diamonds are found in (Igneous / Metamorphic) rock. 2.1.9. Igneous rock (is / is not) normally in layers. 2.1.10. (Metamorphic / Igneous) rock is often called a basic rock since it comes directly from magma.
