The Rock Cycle
By Katie Walters & Catherine Johnson
What is a Rock Cycle?
3 different rocks...
Characteristics: Shiny, Dense, Light
Example Rocks: Basalt Lava, Andesite, Dacite Lava
Formed by: cooling of magma or lava.
Characteristics: fine grained, most fossils are sedimentary
Example Rocks: Breccia, Sandstone, Siltstone
Formed by: sediments pressed or cemented together
Characteristics: rarely fossils, may react with acids, may have layers of visible crystals
Example Rocks: Marble, Slate, Phyllite
Formed by: intense temperature and pressure