Southern Ontario mining history | Wat on Earth ...
2021-10-15 · Southern Ontario mining history. 7,500 BC: Sheguiandah quartzite quarry, Manitoulin Island. Pre 1650: Porte de l''Enfer, red ochre mine, Mattawa River. 1800 Ontario''s first blast furnace for iron a Lyndhurst (Furnace Falls), Leeds County. Soon …