Geological map of the Silver Mountain region of Ontario, 1887

The Geological Survey of Canada was established in 1842 and began producing maps soon after. This map is unusual in that it combines geological data and contour lines.

Catalogue entry:
Ingall, Elfric Drew.
Geological and topographical map of the Silver Mountain Mining District : [Ontario] / by Elfric Drew Ingall. — Scale 1:15 840. — [Ottawa] : Geological and Natural History Survey of Canada, 1887 (Montreal : G.E. Desbarats & Son, Lith.). — 1 map : col. ; 54 x 85 cm, on sheet 74 x 107 cm. — To accompany: Report on mines and mining on Lake Superior. Annual report, part H. —

Ref. No.: NMC 183945