On April 29, 1903, at about 4 a.m., part of Turtle Mountain collapsed over Frank, Alberta. About thirty million cubic meters of rock stand out. A portion of the city is buried; more than seventy people die according to the provincial geological service.
The mine entrance is also covered. Miners who remain underground must open an exit by digging up. So the collapse not only destroyed what was on the surface, it changed the very possibility of reaching the outside for those who worked in the mountain.
The debris field remains visible. Structure, creases and fractures predisposed the slope to rupture; the possible factors are not limited to a mining explosion.
What we know
Geological structure is the main factor presented by AGS; the exact role of other factors is not reduced to a single cause.
To go to the source
References accessed October 11, 2026. Linked pages may be in another language.
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