The "Living Rock" DVD, a joint publication of the US Geological Survey and Alpha DVD, is a one hour educational program about the Earth"s geology. Targeted at High School grade levels, Living Rock introduces students to such geology concepts as: Geologic Time; Continental Crust; Plate Tectonics; Volcanic Activity; Earthquakes; Subduction Zones; Erosion and Glaciers. The Living Rock DVD also includes over 400 USGS "Fact Sheets" in Adobe Acrobat format, viewable on all PC and Mac systems with a DVD-ROM drive.