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columnal

A Dictionary of Earth Sciences | 1999 | | © A Dictionary of Earth Sciences 1999, originally published by Oxford University Press 1999. (Hide copyright information) Copyright

columnal One of the plates that form the stem (stalk) of crinoids (Crinoidea). Commonly cylindrical, columnals have a variety of forms and may produce an articulated stem of variable length. See also OSSICLE.

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AILSA ALLABY and MICHAEL ALLABY. "columnal." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 7 Dec. 2009 <http://www.encyclopedia.com>.

AILSA ALLABY and MICHAEL ALLABY. "columnal." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (December 7, 2009). http://www.encyclopedia.com/doc/1O13-columnal.html

AILSA ALLABY and MICHAEL ALLABY. "columnal." A Dictionary of Earth Sciences. 1999. Retrieved December 07, 2009 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-columnal.html

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