| | Report (issue) | Energy, Mines and Resources Canada E:nergie, Mines et Ressourees Canada Canada THE ENERGY OF OUR RESOURCES...OUR IDEAS COVER Left: Amethyst - Thunder Bay, Ontario. Specimen measures 4.5 cm across the base. National...no. 17206. GSC 204971-1 Geological Survey of Canada Miscellaneous Report 49 ROCKS AND MINERALS FOR... © Minister of Supply and Services Canada 1991 Available in Canada through authorized bookstore agents...bookstores or by mail from Canada Communication Group - Publishing Ottawa, Canada KIA OS9 and from. Geological | | | Journal (issue) | Rocks and Minerals of Ontario -- H f ONTARIO DEPARTMENT OF MINES AND NORTHERN AFFAIRS Honourable...and Minerals of Ontario By D. F. HEWITT Chief, Industrial Mineral Section Ontario Department of Mines...Early Precambrian pillow lavas; Munekun Lake, District of Kenora. (Courtesy L. D. Ayres). Lower right: Cleavage... (Courtesy The International Nickel Company of Canada, Limited). Centre left: Eurypterus lacustris, an...about 400 m.y. ago; Welland County. (Courtesy Shell Canada Ltd.). right: left: — — — Centre right: Archaeocrinus |
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