Geology. More fully volcanic neck. A column of solidified igneous rock or consolidated rock fragments filling a volcanic vent, esp. when exposed…
单词 | θ4913 |
释义 | the world > the earth > structure of the earth > structural features > volcanic formations > [noun] > lava formations > plug (4) neck1876 Geology. More fully volcanic neck. A column of solidified igneous rock or consolidated rock fragments filling a volcanic vent, esp. when exposed… plug1882 Geology. A cylindrical mass of solidified lava formed in the vent of a volcano. Also volcanic plug. Cf. neck, n.1 7c. spine1903 A tall mass of lava projecting upwards from the mouth of a volcano. tholoid1912 A dome-shaped, steep-sided extrusion of hardened lava plugging the vent of a volcano. |
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