ROCKS!!!

3 Types: Igneous, Sedimentary, and Metamorphic

The Rock Cycle

Rocks are only created because of the rock cycle. The rock cycle changes rocks into other things because of cooling, solidifying, weathering, erosion, pressing, cementing, compacting, heat, and/or pressure. These things can change rocks into the three types of rocks, magma, and sediment.

ABOUT THE ROCKS!!!!!!

Sedimentary Rocks

An example of a sedimentary rock is Breccia. It is shown in the picture. Sedimentary rocks are created by sediment compacting together. This rock has the most fossils out of all of the rock types.There are 3 types of sedimentary rocks:

1. Clastic Sedimentary rocks that are made by mechanical weathering (Breccia is an example of these)

2. Chemical Sedimentary Rocks that are made when minerals in the solution become supersaturated.

3. Organic Sedimentary Rocks that are made by plant and animal debris.

Source:

Metamorphic Rocks

An example of Metamorphic Rock is Amphibolite. It is shown in the picture. Metamorphic Rocks are made because of heat and pressure. It is made of only Sedimentary Rocks and Igneous Rocks when they are deep beneath the earth's surface. There are 2 types of Metamorphic Rocks:

1. Foliated Metamorphic Rocks, made by heat and pressure, which have a layered or banded surface.

2. Non-Foliated Metamorphic Rock, that do not have a banded surface.

Igneous Rocks

An example of Igneous Rocks is Andesite. It is shown in the picture. Igneous Rocks are made by cooled magma. There are 2 types of Igneous Rock.

1. Intrusive Igneous Rocks, or Igneous Rocks that solidify below earth's surface

2. Extrusive Igneous Rocks, or Igneous Rocks that solidify above earth's surface