“pyroclastic ground surge”的概念、定义、翻译、参考文献-科学参考

单词	pyroclastic ground surge
释义	pyroclastic ground surge [¦pī·rǝ¦klas·tik `grau̇nd ´sǝrj] ^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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