| Notes: | Covers Canada from Manitoba east. Covers northern United States from the Dakotas east.
"The geology of Canada being derived from the results of the Canadian Geological Survey, that of the other British provinces from the labors of Dr. J.W. Dawson, Professors James Robb, J.B. Jukes and others, while that of the United States is compiled under the authority of Professor James Hall from various sources mentioned in the Atlas of the Geology of Canada, by Sir W.E. Logan, Director of the Geological Survey of Canada."
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