Phoenix pipe

{{Short description|Diatreme in Canada}}

The Phoenix 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.[http://www.ags.gov.ab.ca/minerals/diamonds/8IKC_Abstract.pdf Petrogenetic considerations for the Late Cretaceous northern Alberta kimberlite province] {{webarchive|url=https://web.archive.org/web/20110526054242/http://www.ags.gov.ab.ca/minerals/diamonds/8ikc_abstract.pdf |date=2011-05-26 }}[http://www.ags.gov.ab.ca/minerals/diamonds/diamonds.html Alberta Geological Survey: Kimberlites, Indicator Minerals and Diamonds] {{webarchive|url=https://web.archive.org/web/20100326152129/http://www.ags.gov.ab.ca/minerals/diamonds/diamonds.html |date=2010-03-26 }}