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Date: 2012-01-25 17:00:05Sandstone Glaciology Proterozoic Jacobsville Sandstone Upper Peninsula of Michigan Bayfield group Type locality Cryogenian Neoproterozoic Geology Historical geology Building materials | Lithostratigraphy and Age of Jacobsville Formation around the Lake Superior Basin, U.S.A. and Canada G[removed]1AAdd to Reading ListSource URL: www.migeweb.orgDownload Document from Source WebsiteFile Size: 1,70 MBShare Document on Facebook |