| 单词 | volcanic glass |
| 释义 | volcanic glass (once / 187609 pages) n WORD FAMILY volcanic glass USAGE EXAMPLESAt Obsidian Cliff you can see a natural outcrop of black volcanic glass that Native Americans shaped into arrowheads. The Guardian(Feb 19, 2016) One man’s skeleton was found with a sharp blade made of a volcanic glass called obsidian still embedded in his skull. Washington Post(Jan 25, 2016) One man's skeleton was found with a sharp blade made of a volcanic glass called obsidian still embedded in his skull. Reuters(Jan 20, 2016) n a kind of natural glass produced when molten lava cools very rapidly Hypo|Hyper obsidian acid or granitic glass formed by the rapid cooling of lava without crystallization; usually dark, but transparent in thin pieces pitchstonedark acid granitic glass tachylitea basic or basalt glass volcanic rock extrusive igneous rock solidified near or on the surface of the Earth |
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