Answer:
Three main classifications of rocks are
- metamorphic rock
- igneous rock
Step-by-step explanation:
Three main classifications of rocks are:
- Sedimentary rocks are formed from the shells, sand particles and pebbles.
Example of Sedimentary rock limestone.
- Igneous rocks are formed by the crystallization and solidification of magma.
Example of Igneous rock basalt.
- Metamorphic rocks are formed when the igneous rock or sedimentary rock they are exposed to high temperature and pressure below the Earth's surface.
Example of Metamorphic rock is marble.