Callander Bay

Callander Bay is a bay at the extreme east of Lake Nipissing in Ontario, Canada. It is 3 km in diameter and the main community of Callander is located just east of Callander Bay.

Geology

Callander Bay is an eroded Proterozoic volcanic pipe [ [http://home.cogeco.ca/~nananne/backgroundgeology/070211-BackgroundGeology-w.html Background Geology of the North Bay area.] Retrieved on 2007-09-24] 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. [ [http://www.koeln.netsurf.de/~w.steffens/can.htm Other localities - Canada] Retrieved on 2007-09-24]

ee also

*Volcanism in Canada
*List of volcanoes in Canada
*Manitou Islands

References