United States of America........................... Canada............................................. Mexi...quartz-pebble conglomerate at the Elliot Lake-Blind River area, Canada (average grade 0.12 percent U30s), and...and at the Witwatersrand basin area in the Republic of South Africa (average grade 0.025 percent U308)...cobalt and silver in the Northwest Territories of Canada, for radium and vanadium in Colorado, and for silver...1943) (e.g., Blind River-Elliot Lake area and other areas in Canada; Greenland, Australia, Africa, India |