Geology. Lava in the form of hard irregular lumps (= scoria, n. 2); a lump or deposit of lava of this kind.
| 单词 | θ5736 |
| 释义 | the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [noun] > volcanic rocks > lava > scoria (5) slag1673 Geology. Lava in the form of hard irregular lumps (= scoria, n. 2); a lump or deposit of lava of this kind. cinder1774 Volcanic scoria. scoria1792 Rough clinker-like masses formed by the cooling of the surface of molten lava upon exposure to the air, and distended by the expansion of imprisoned… dross1811 Volcanic scoria. Obsolete. rare. clinker1850 A mass of hardened volcanic lava. |
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