Volcanic neck


Also found in: Encyclopedia, Wikipedia.

Vol`can´ic neck


1.(Geol.) A column of igneous rock formed by congelation of lava in the conduit of a volcano and later exposed by the removal of surrounding rocks.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
Aside from Cargill's vast phosphate deposit near Kapuskasing (which is refined into fertilizer), Cosec knows of no other producers in the Sudbury basin for the simple reason these rocks are hard to find in volcanic necks, as are diamonds.