The Proterozoic in Canada by James E. Gill - 9781487599027

The Proterozoic in CanadaAuthor(s): James E. Gill\nFormat: Paperback\nPublisher: University of Toronto Press, Canada\nImprint: University of Toronto Press\nISBN-13: 9781487599027, 978-1487599027\nSynopsis\nProterozoic time produced much of great interest to geologists, and was of tremendous economic import to the people of Canada and the United States. Most of the iron deposits of the Lake Superior district, the Michigan copper deposits, the enormously important Sudbury nickel-copper-platinum deposits, the spectacular silver deposits of the Cobalt district, and all of the important uranium ores in the Shield area are considered to have formed during this period in geological time.\n\n Proterozoic rock groups include those Precambrian rocks which are least deformed and metamorphosed. Because of their important economic deposits, they have been examined in great detail in certain localities. The results of such examination, and of others which were for reconnaissance only, are summariz.