Rock Types and the Rock Cycle

There are three basic rock types.  This classification is based on how they are formed:

Igneous Rocks

Sedimentary Rock

Click here to see all kinds of sedimentary rocks.

Metamorphic Rock

The Rock Cycle

Study the diagram below.  You will see that nothing lasts forever on this earth (not even rocks).  The rock cycle shows us that given enough time, rocks form, they break up, they reform, they get transformed.  This is hard for us to imagine because a human lifetime is almost nothing to a rock.

ŠJim Mihal 2004, 2006 - all rights reserved