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Date: 2011-06-20 15:59:51Cretaceous Extinction events Climate history Paleogene Volcanoes Gubbio Walter Alvarez Marker horizon Geomagnetic reversal Geologic time scale Phanerozoic Historical geology | Sedimentology[removed], 137–148 doi: [removed]j[removed]01010.xAdd to Reading ListSource URL: usm.maine.eduDownload Document from Source WebsiteFile Size: 935,61 KBShare Document on Facebook |