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Date: 2007-06-19 09:28:44Glaciology Historical geology Climate history Physical geography Sandstone Last glacial period Pocono Formation Geology of Pennsylvania Geology Pleistocene | COMMONWEALTH OF PENNSYLVANIA Edward G. Rendell, Governor BUREAU OF TOPOGRAPHIC AND GEOLOGIC SURVEY Jay B. Parrish, DirectorAdd to Reading ListSource URL: ngmdb.usgs.govDownload Document from Source WebsiteFile Size: 1,34 MBShare Document on Facebook |