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Date: 2011-11-29 11:55:50Geological history of Earth Geology Phanerozoic Quaternary geochronology Geological ages Phil Gibbard Quaternary Middle Pleistocene Gelasian International Commission on Stratigraphy Pleistocene Global Boundary Stratotype Section and Point | International Commission on Stratigraphy Subcommission on Quaternary StratigraphyAdd to Reading ListSource URL: quaternary.stratigraphy.orgDownload Document from Source WebsiteFile Size: 74,00 KBShare Document on Facebook |