Birds eye view of Canada's deadliest rockslide - The Frank Slide in 1903. Scientists have estimated that the block of rock which fell from the top of Turtle Mountain during the Frank Slide was approximately 1 kilometre wide, almost half a kilometre (425 metres) high and 150 metres thick. This calculates to a volume of approximately 44 million cubic metres of rock, or 110 million metric tonnes. 600 people lived in Frank at the time of the slide and over 100 were in the path of the falling rocks.
