Thetford Mines, city (1991 pop. 17,273), S Que., Canada, NE of Sherbrooke and S of Quebec. The city, developed after the discovery (1876) of large asbestos deposits, is located in one of the world's largest asbestos-producing regions. Chromium and feldspar are also mined.
The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.