Earth Revealed

Sedimentary Rocks: The Key to Past Environments (4x6)

Air date: Jun 08, 1992

This program returns to the Grand Canyon: its exposed layers of sedimentary rock allow scientists to peer into the geologic past. The movement of sediment and its deposition are covered, and the processes of lithification, compaction, and cementation that produce sedimentary rocks are explained. Organic components of rock are also discussed.