Amanda Roe, Brittany Earnhardt
What it is
3 Types of rocks
Igneous rock may form with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks.
Example rock: gabbro
Granulite is a metamorphic rock that is formed from the igneous rock basalt
Characteristics may include, display foliation, which is the layering, banding, or platiness that is associated with the rearrangement of mineral crystals due to directional pressure
Example rock: Marble
Sedimentary rocks are formed by sediment that is deposited over time, usually as layers at the bottom of lakes and oceans.
The characteristics are sandstone, clastic, vary greatly in size and how they feel and look.
Example rock: Sandstone