Gold Mining in Canada
After the Cariboo and Klondike rushes, gold production in Canada entered a new era with the discovery of lode deposits in the Porcupine area in 1909. The mines in this district, notably the Hollinger which became one of the world's largest gold mines, along with those of the Kirkland Lake area, established Canada as a leading producer of this metal. Their success was followed by other important finds at Rouyn in Quebec, in northern Manitoba, in British Columbia and at Yellowknife in the Northwest Territories.
Plaque via Alan L. Brown's site Ontario Plaques. Full page here.