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Callander Bay

Callander Bay is a bay at the extreme east of Lake Nipissing in Nipissing District, Ontario, Canada. It is 3 kilometres (1.9 mi) in diameter and the main community of Callander is located on its east side.


Callander Bay is an eroded Proterozoic volcanic pipe[1] formed by the violent, supersonic eruption of a deep-origin volcano. These volcanoes originate at least three times as deep as most other volcanoes, and the resulting magma that is pushed toward the surface is high in magnesium and volatile compounds such as water and carbon dioxide. As the body of magma rises toward the surface, the volatile compounds transform to gaseous phase as pressure is reduced with decreasing depth. This sudden expansion propels the magma upward at rapid speeds, resulting in a shallow supersonic eruption.

Callander Bay contains nepheline syenites, carbonatite, aegirine, amphibole, analcime, apatite, barite, biotite, calcite, cancrinite, chalcopyrite, chlorite, diopside, dolomite, fluorite, garnet, hematite, kaersutite, magnetite, muscovite, nepheline, olivine, perthite, pyrite, pyroxene and pyrrhotite.[2]

See also


  1. ^ "Background Geology of the North Bay area". Retrieved 2007-09-24.  
  2. ^ "Other localities - Canada". Retrieved 2007-09-28.   Site information taken from Woolley, Alan R (1987). Alkaline rocks and carbonatites of the world. Part 1, North and South America. London: British Museum (Natural History). ISBN 9780565009717. OCLC 220114352.  

Coordinates: 46°12′45″N 79°23′20″W / 46.2125°N 79.38889°W / 46.2125; -79.38889



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