The Legend pipe is a diatreme associated with the Birch Mountains kimberlite field in northern Alberta, Canada. It is thought to have formed about 75 million years ago during the Late Cretaceous period.Petrogenetic considerations for the Late Cretaceous northern Alberta kimberlite province Alberta Geological Survey: Kimberlites, Indicator Minerals and Diamonds

See also Volcanism of Western Canada List of volcanoes in Canada

References