Grand Canyon Country
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Reveals how the Grand Canyon country tells us about the past history of our Earth. Shows that the many sedimentary rock layers of this region represent the five eras of geologic history. Points out that the kind of rock, pattern of deposition and fossils of each layer record a story of ancient oceans, river valleys, floodplains and wind blown sand dunes. Provides animated drawings that indicate the successive rock layers and shows their relationship to geologic history.
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