(redirected from Amherstburg, Ontario) Also found in: Wikipedia.
industrial town (1991 pop. 8,921), S Ont., Canada, on the Detroit River. Fort Malden, built (1797–99) to replace a post lost when Detroit was ceded to the United States, is now within a national historic park.
General Chemical operates a 430,000 mt/yr synthetic soda-ash plant at Amherstburg, Ontario, Industria del Alcali SA has a 290,000-mt/yr synthetic soda-ash plant at Monterrey, and Sosa Texcoco operates a 210,000-mt/yr natural-ash plant at Mexico City--for a total Mexican capacity of 500,000 mt/yr.