Rocks / Burrud, John

Examines the structure and history of Earth from the perspective of visitors from a distant galaxy, focusing on the characteristics and formation of different types of rocks; features a visit to the Obsidian Dome rock formation at Mammother Mountain in California; and includes a demonstration of how particles of sediment settle.

Describes the characteristics of igneous, sedimentary, and metamorphic rocks; visits the unique rock formation Obsidian Dome at Mammoth Mountain in California; and presents a hands-on demonstration of the rates at which different-sized sediment particles settle out of water.