Sedimentary rocks the key to past environments ; Metamorphic rocks

Returns to the Grand Canyon where 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.

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"Metamorphic rocks"@en
"Living with Earth, part I"@en
"Key to past environments"
"Living with Earth, part II"@en

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"Returns to the Grand Canyon where 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."@en
"Illustrates the importance of sedimentary rocks in understanding Earth's surface and environmental conditions of the past."@en
"The Grand Canyon provides geologists with one of the most complete rock of anywhere on Earth. Analyzing sedimentary rock provides clues of climate, earth movement, and geologic history. This program demonstrates a variety of environments from desert to ocean and introduces the characteristics that form part of each one."@en
"Discusses how sedimentary and metamorphic rocks are created and what they tell about the Earths past climate, environment and history."@en
"Illustrates the importance of sedimentary rocks in understanding Earth's surface."@en
"The 1st program illustrates the importance of sedimentary rocks in understanding Earth's surface. The 2d program interprets the causes of metamorphism and the kinds of rocks produced."
"Pt. 17 - Illustrates the importance of sedimentary rocks in understanding Earth's surface.-- Pt. 18 - Interprets the causative factors of metamorphism and the kinds of rocks produced."@en
"Explains how sedimentary rock provides clues to earth's geologic past, including climate, vegetation, aquatic environment and topography. Reviews processes involved in rock formation (erosion, sediment transportation and depostition, lithification). Discusses analysis techniques used by geologists, including the principle of uniformity, sedimentary structures, bedding patterns. Surveys commercial and industrial uses of the resource."@en