| 释义 |
Volcanic neck
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. |
Volcanic Neck
volcanic neck[väl′kan·ik ′nek] (geology) A residual remnant of the pipe or throat of a volcano that was filled with solidified lava after its final eruption. Volcanic Neck a round or ellipsoidal cylindrical magmatic body composed of effusive rock or pyroclastic materials, or a combination of both. These materials originally filled the volcanic channel (vent) through which lava rose to the surface. When erosion occurs, the volcanic neck stands out sharply on the surface of the earth. |