Title |
Comment |
Keywords |
Grand Canyon
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01:22 - 02:31 (01:09) / 1.1 MB
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"James Sadd", "Grand Canyon", "John Wesley Powell", geology, "sedimentary rock", "Colorado River", landscape, "geologic time", "geologic history", "mineral composition", "grain size", "grain shape", structure, "rock color", climate, "vegetation pattern", shoreline, topography, "Earth's surface", sediment
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Geology School Keywords
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