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- Q6642389 subject Q6802033.
- Q6642389 subject Q8492644.
- Q6642389 abstract "Scoria is a highly vesicular, dark colored volcanic rock that may or may not contain crystals (phenocrysts). It is typically dark in color (generally dark brown, black or purplish red), and basaltic or andesitic in composition. Scoria is relatively low in density as a result of its numerous macroscopic ellipsoidal vesicles, but in contrast to pumice, all scoria has a specific gravity greater than 1, and sinks in water. The holes or vesicles form when gases that were dissolved in the magma come out of solution as it erupts, creating bubbles in the molten rock, some of which are frozen in place as the rock cools and solidifies. Scoria may form as part of a lava flow, typically near its surface, or as fragmental ejecta (lapilli, blocks and bombs), for instance in Strombolian eruptions that form steep-sided scoria cones. Most scoria is composed of glassy fragments, and may contain phenocrysts. The word scoria comes from the Greek σκωρία, skōria, rust. An old name for scoria is cinder.".
- Q6642389 thumbnail Scoria_Macro_Digon3.jpg?width=300.
- Q6642389 wikiPageWikiLink Q108689.
- Q6642389 wikiPageWikiLink Q10972285.
- Q6642389 wikiPageWikiLink Q1192560.
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- Q6642389 wikiPageWikiLink Q1396047.
- Q6642389 wikiPageWikiLink Q14452.
- Q6642389 wikiPageWikiLink Q14935514.
- Q6642389 wikiPageWikiLink Q16742056.
- Q6642389 wikiPageWikiLink Q180044.
- Q6642389 wikiPageWikiLink Q1806785.
- Q6642389 wikiPageWikiLink Q181908.
- Q6642389 wikiPageWikiLink Q19875407.
- Q6642389 wikiPageWikiLink Q19876651.
- Q6642389 wikiPageWikiLink Q20350.
- Q6642389 wikiPageWikiLink Q25445.
- Q6642389 wikiPageWikiLink Q2552055.
- Q6642389 wikiPageWikiLink Q29539.
- Q6642389 wikiPageWikiLink Q34679.
- Q6642389 wikiPageWikiLink Q3496141.
- Q6642389 wikiPageWikiLink Q383481.
- Q6642389 wikiPageWikiLink Q408.
- Q6642389 wikiPageWikiLink Q42278.
- Q6642389 wikiPageWikiLink Q43338.
- Q6642389 wikiPageWikiLink Q484924.
- Q6642389 wikiPageWikiLink Q611880.
- Q6642389 wikiPageWikiLink Q664.
- Q6642389 wikiPageWikiLink Q6647900.
- Q6642389 wikiPageWikiLink Q6802033.
- Q6642389 wikiPageWikiLink Q8063.
- Q6642389 wikiPageWikiLink Q8072.
- Q6642389 wikiPageWikiLink Q8492644.
- Q6642389 wikiPageWikiLink Q852486.
- Q6642389 wikiPageWikiLink Q9129.
- Q6642389 wikiPageWikiLink Q918774.
- Q6642389 wikiPageWikiLink Q980422.
- Q6642389 comment "Scoria is a highly vesicular, dark colored volcanic rock that may or may not contain crystals (phenocrysts). It is typically dark in color (generally dark brown, black or purplish red), and basaltic or andesitic in composition. Scoria is relatively low in density as a result of its numerous macroscopic ellipsoidal vesicles, but in contrast to pumice, all scoria has a specific gravity greater than 1, and sinks in water.".
- Q6642389 label "Scoria".
- Q6642389 depiction Scoria_Macro_Digon3.jpg.