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scoria |
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scoria: see pumice pumice (pŭm`ĭs), volcanic glass formed by the solidification of lava that is permeated with gas bubbles. ..... Click the link for more information. . scoriaHeavy, dark, glassy igneous rock that contains many bubblelike cavities. Foamlike scoria, in which the bubbles are very thin shells of solidified basaltic magma, occurs as a product of explosive eruptions (as on Hawaii) and as frothy crusts on some lavas. Other scoria, sometimes called volcanic cinder, resembles clinkers, or cinders from a coal furnace. scoria 1. a rough cindery crust on top of solidified lava flows containing numerous vesicles 2. refuse obtained from smelted ore; slag scoria [′skȯr·ē·ə] (geology) Vesicular, cindery, dark lava formed by the escape and expansion of gases in basaltic or andesitic magma; generally denser and darker than pumice. (materials) Refuse after melting metals or reducing ore. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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