This Cycle Rocks!

Earth's surface is constantly changing. Gradual changes such as weathering and erosion can change the look of the surface over millions of years. More sudden changes such as volcanic eruptions and earthquakes can change the surface in a matter of minutes. The purpose of this site is to provide students with an exploration of the rock cycle, so that studetns can investigate how rocks are formed and how they can change.

Photo courtesy of the USGS. (http://geomaps.wr.usgs.gov/par ks/rxmin/rock.html)