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Date: 2009-04-07 17:39:39Geological history of Earth Ordovician Paleomagnetism Cambrian Geologic time scale Arenig Miocene Precambrian Paleozoic Geology Historical geology Geochronology | 1999 GEOLOGIC TIME SCALE C5B C5C C5DAdd to Reading ListSource URL: rock.geosociety.orgDownload Document from Source WebsiteFile Size: 233,13 KBShare Document on Facebook |