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Preservation Action Plans
St. Clair Region Conservation Authority
Toronto Telegram fonds, F0433
Grey Sauble Conservation Authority
Geological Survey of Canada
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Map showing the distribution of Huronian rocks between rivers Batchehwahnung and Mississagui
This is a geological map of the Sault Ste. Marie area in 1865. It shows different rock and soil materials.
Sketch map of part of southwestern Ontario showing shore-lines of ancient Great Lakes : to illustrate report of Robert Chalmers
This is a sketch map of southwestern Ontario showing the shore-lines of the ancient Great Lakes, from 1902. It also shows railways and county boundaries, and relief is shown by contours and spot heights.