| 单词 |
pyroclastic ground surge |
| 释义 |
pyroclastic ground surge pyroclastic ground surge[¦pī·rə¦klas·tik ′grau̇nd ‚sərj] (geology) The relatively thin mantle of rock found around a volcanic vent; the thickness is not uniform, the internal stratification is not parallel to the top and bottom of the layer, and the extent is a few kilometers from the source. |
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