Surveys recent theories and discoveries in geology, including research into plate tectonics, theories of mass extinctions, and new perspectives on the earth caused by studying the geology of other planets.
National Geographic has teamed up with NASA and the US Geological Survey to create a 4-D planet Earth, dramatizing the bumper car antics of continents, ice ages pulsing out of the poles and back again, march of sand dunes and more.
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.
Provides the most important conceptsand processes in geology, including geologic time, the earth in context, principles, minerals, magmas and intrusive rocks, volcanic rocks,weathering and erosion, sedimentary rocks and more. (105 min.).
Call off the bulldozers. Call off the cranes. All you need is rapidly moving water - and lots of time - to create your very own cave. Discover how water, wind, earthquakes, and volcanoes, shape caves, valleys, and coastlines in the never-ending construction project on Earth's surface.
