But the base of these high walls consisted of broken soil over which there lay picturesque piles of volcanic blocks and enormous pumice stones.
但悬崖的下边，地势崎岖不平，上面累积得很好看，堆着许多火山喷出的大块石头和巨大的火山浮石。
| 单词 | Volcanic block |
| 释义 |
Volcanic block
原声例句
海底两万里（原版） But the base of these high walls consisted of broken soil over which there lay picturesque piles of volcanic blocks and enormous pumice stones. 但悬崖的下边，地势崎岖不平，上面累积得很好看，堆着许多火山喷出的大块石头和巨大的火山浮石。
英语百科
Volcanic blockA volcanic block is a fragment of rock that measures more than 64 mm (2.5 in) in diameter and is erupted in a solid condition. Blocks are formed from material from previous eruptions or from country rock and are therefore mostly accessory or accidental in origin. Blocks also occur due to the impact and breakage of volcanic bombs (a bomb is a block with streamlined appearance, often expelled in a molten state). Bombs can also occur due to the disruption of the crust of a lava dome that has formed up or over a vent during an eruption. |
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