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![]() Date: 2009-02-21 02:33:52Geologic time scale Stratigraphy Earth sciences Stage Global Boundary Stratotype Section and Point Chronostratigraphy Formation Sakmarian Chronozone Geology Historical geology Geochronology | Source URL: www.stratigraphy.orgDownload Document from Source WebsiteFile Size: 289,91 KBShare Document on Facebook |