Sketch map of part of southwestern Ontario showing shore-lines of ancient Great Lakes : to illustrate report of Robert Chalmers
Sketch map of part of southwestern Ontario showing shore-lines of ancient Great Lakes : to illustrate report of Robert Chalmers
Description
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.