Rock Cycle

by Lindsey Reimer

What is the Rock Cycle?

The rock cycle is a never ending process that includes 3 different types of rocks: Igneous,Sedimentary, and Metamorphic. When the rocks melt or cool, they become different types of rocks. Weathering and Erosion can also change the rock.


Obsidian is an igneous rock. It is classified as a mineraloid which means that it is a mineral like substance that lacks crystal structures. It is formed from the result of when felsic lava cools with minimum crystal growth. Obsidian is usually found in the west but can be found many other places.


Sandstone is a sedimentary rock. It forms when grains of sand are weathered. Then it falls down in one place the sand creates layers and they stick together. They are usually found in areas that contain water.


Marble is classified as a metamorphic rock.It is formed when limestone softens from heat and pressure and is recrystalized into marble. Marble is found in mountanious regions.