scoria cone

A Dictionary of Earth Sciences | 1999 | 396 words | Copyright

scoria cone (cinder cone, ash cone) Volcanic cone built of pyroclastic material (cinders and scoriaceous ejecta) usually of basaltic or andesitic composition, dominated by fragments 2–64mm diameter. These air-fall deposits build a straight-sided cone with slopes of about 30° (the angle of repose). Complex varieties may occur, including breached or gaping, and conewithin-cone types.

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AILSA ALLABY and MICHAEL ALLABY. "scoria cone." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>.

AILSA ALLABY and MICHAEL ALLABY. "scoria cone." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O13-scoriacone.html

AILSA ALLABY and MICHAEL ALLABY. "scoria cone." A Dictionary of Earth Sciences. 1999. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-scoriacone.html

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