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![]() Date: 2009-09-03 16:12:44Plate tectonics Proterozoic Supercontinents Orogeny Geology of North America Grenville orogeny Rodinia Accretionary wedge Columbia Geology Historical geology Geologic time scale | Source URL: www.geo.arizona.eduDownload Document from Source WebsiteFile Size: 1,23 MBShare Document on Facebook |