3 main categories of rocks

The three main types, or classes, of rock are sedimentary, metamorphic, and igneous and the differences among them have to do with how they are formed. Sedimentary rocks are formed from particles of sand, shells, pebbles, and other fragments of material. Together, all these particles are called sediment.

1. 3 Main categories of rocks By: Cloyie L. Delos Santos

2. Igneous rocks Is usually magma, a molten material from deep within the earth that cools and hardens .

3. Igneous IntRusive Igneous Extrusive Types of igneous rocks scoria

4. When igneous rocks are exposed at the surface, they begin to wear away. Sedimentary rocks Sandstone

5. 3 Main types of sedimentary rocks:

6. Eart h movements can cause rocks to be pressed, bent or deeply buried under layers of the rocks. Metamorphic rocks

7. Types of Metamorpic rocks Non-foliated metamorphic rocks Foliated metamorphic rocks

8. Rock cycle Weather and erosion Heat and pressure Heat and pressure Sedimentary rocks Metamorphic rocks magma melting Compacting and cementing Weather and erosion melting cooling Igneous rocks sediment Weather and erosion