Images of an actual landslide illustrate the phenomenon. Sedimentary Rocks: The Key to Past Environments This program returns to the Grand Canyon: its exposed layers of sedimentary rock allow scientists to peer into the geologic past. Metamorphic Rocks The weight of a mountain creates enough pressure to recrystallize rock, thus creating metamorphic rocks.
This program shows landscapes formed by rivers, the various types of rivers, the basic parts of a river, and how characteristics of rivers their slope, channel, and discharge erode and build the surrounding terrain. This program focuses on how such carving takes place over time, looking at erosion and deposition processes as they relate to river characteristics and type of rock.
This program traces the development of plate tectonics, beginning with the contributions and methods of geologist Alfred Wegener.
Sea-floor spreading, continental drift, paleomagnetism, and the primordial supercontinent Pangaea are some of the topics covered. Plate Dynamics This program examines the movement and interaction of tectonic plates, which account for a vast array of geologic formations and phenomena from California's San Andreas Fault to the Rift Valley of eastern Africa.
The program provides images of glaciers and glacial landforms such as moraines, and discusses how study of glaciers may help us understand ice ages and the greenhouse effect. Waves, Beaches and Coasts This program shows the dynamic interaction of two geologic agents: rocky landmasses and the energy of the ocean.
Aspects of waves their types, parts, movement, and impact on the shore are illustrated.