volcanic pipe

American  

[vahl-kan-ik pahyp] / vɑlˈkæn ɪk ˈpaɪp /

noun

1. Geology. a cylindrical or carrot-shaped conduit formed vertically beneath a volcano by magma emerging through the earth's crust up to the surface, eventually becoming filled with solidified magma and older rock fragments and noted for being the source of more commercial diamonds than any other geologic feature on earth.

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volcanic pipe Scientific  

1. A vertical conduit below a volcano through which magma has passed and that has become filled with solidified magma, volcanic breccia, and fragments of older rock.

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Example Sentences

A diamond, the locksmith reminds himself, is only a piece of carbon compressed in the bowels of the earth for eons and driven to the surface in a volcanic pipe.

From "All the Light We Cannot See" by Anthony Doerr

There was intermittent fighting around the volcanic pipe, the police reported.

From The Flaming Mountain by Goodwin, Harold L. (Harold Leland)

Either guarding the volcanic pipe or working in it.

From The Flaming Mountain by Goodwin, Harold L. (Harold Leland)

Only a bare handful even knew that the diamonds occurred only in a small volcanic pipe on the western slope.

From The Flaming Mountain by Goodwin, Harold L. (Harold Leland)

A shelter had been erected on one side of the volcanic pipe.

From The Flaming Mountain by Goodwin, Harold L. (Harold Leland)