Earth revealed
Subtitle: Disc 5, programs 17-20
By: Annenberg Media ; Corporation for Community College Television ; produced and directed by Robert Lattanzio
Contributors: Stansfield, David; Muldaur, Maureen; Sadd, James   (James Lester); Gilfillan, David; INTELECOM Intelligent Telecommunications (Firm); Corporation for Community College Television; Annenberg Media
Series: EES 103 (NU course); EES 103A (NU course); EES 301 (NU course)
Publisher: Annenburg Media
Published: 2011
Place of publication: [S. Burlington, VT]
Language: eng
Format: [videorecording] /
Number of pages: 120
ISBN-13: 9781576807910
Subjects: Geology; Popular works; Earth sciences; Rocks; Sedimentary rocks; Metamorphic rocks; Plate tectonics; Erosion; Floods; Rivers; Continental crust; Earthquakes; Volcanoes; Mountains; Minerals; Groundwater; Glaciers; Ocean; Continental drift; Educational television programs; Science television programs; Documentary television programs; Nonfiction television programs; Video recordings for the hearing impaired; Core; Crust; Surface
Other titles: Earth revealed (Television program); Sedimentary rocks: the key to past environments.; Metamorphic rocks.; Running water I: rivers, erosion and deposition.; Running water II: landscape evolution.
Description: Program 17 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.

Program 18 shows the weight of a mountain creates enough pressure to recrystallize rock, thus creating metamorphic rocks. This program outlines the recrystallization process and the types of rock it can create--from claystone and slate to schist and garnet-bearing gneiss. The relationship of metamorphic rock to plate tectonics is also covered.

Program 19 explains rivers are the most common land feature on Earth and play a vital role in the sculpting of land. 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. Aspects of flooding are also discussed.

Program 20 describes the Colorado River as a powerful geologic agent--powerful enough to have carved the Grand Canyon. 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. The evolution of rivers is covered, along with efforts to prevent harmful consequences to humans.
Notes: Each episode is approximately 28-30 minutes long.

"Produced by Intelecom, 1992."--Container.

Host, James Sadd ; narrator, David Gilfillan.

DVD

Closed-captioned.
Table of contents: title: 17. Sedimentary rocks, the key to past environments / written by David Stansfield : Process and composition of sedimentary rock ; Principle of uniformity and sedimentary structures ; Sedimentary rock records; title: 18. Metamorphic rocks / written by David Stansfield : Varieties and formation of metamorphic rocks ; Metamorphic facies and progressive metamorphism ; Plate tectonics; title: 19. Running water I, rivers, erosion and deposition / written by Maureen Muldaur : River processes ; Flood plains ; Human impact on the Mississippi River; title: 20. Running water II, Landscape evolution / written by Maureen Muldaur : Valley evolution ; Deltas ; Holding the Mississippi River.