Description: A map showing the location of different types of rocks in part of Canada. Chiefly metamorphic and igneous rocks within the heavy lines, chiefly sedimentary rocks without; the Laurentian peneplain is dotted.
Source: Isaiah Bowman, Ph. D, Forest Physiography (New York, NY: John Wiley and Sons, 1911)
Map Credit: The Private Collection of Roy Winkelman |
|
