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Date: 2011-10-05 02:02:42Colorado Plateau Geological surveys Arizona Geological Survey Sabino Canyon Grand Canyon Geologic time scale Arizona Colorado River Geologist Geography of Arizona Geography of the United States Geology | • Vol. 28, No.1 Spring 1998 ARIZONA GEOLOGICAL SURVEYAdd to Reading ListSource URL: azgs.az.govDownload Document from Source WebsiteFile Size: 2,05 MBShare Document on Facebook |