This interactive lesson on metamorphic rocks starts with a review of the rock cycle and goes on to describe the relationship between metamorphic rocks and their parent rock. The lesson then describes the agents of...

The rock cycle is an ongoing process in which rock, driven by tectonic processes such as volcanoes and earthquakes, the surface processes of weathering and erosion, and compaction, is created, destroyed, and recycled....

This site features Flash animations that illustrate various facets of the rock cycle. The visualizations depict rock-forming processes, such as erosion, transportation, deposition, cementation, crystallization,...