Xena pipe
The Xena 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 when this part of Alberta was volcanically active during the Late Cretaceous period.[1][2]
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This article is issued from Wikipedia - version of the 12/2/2010. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.