The Elwin Bay diatreme, also called the Elwin Bay kimberlite, is a small post-Silurian kimberlite diatreme located approximately south of Elwin Bay at the eastern margin of Somerset Island, Nunavut, Canada. It has a diameter of .Occurrence and origin of djerfisherite from the Elwin Bay kimberlite, Somerset Island, Northwest Territories
See also Volcanism in Canada List of volcanoes in Canada
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