Scoria

  • scoria

    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. chemical analysis of scoria found in yemen showed that it was mainly composed of volcanic glass with a few zeolites (e.g. clinoptilolite).[1] most scoria is composed of glassy fragments, and may contain phenocrysts. the word scoria comes from the greek σκωρία, skōria, rust. a colloquial term for scoria is cinder.[2][3]

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Scoria

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. Chemical analysis of scoria found in Yemen showed that it was mainly composed of volcanic glass with a few zeolites (e.g. clinoptilolite).[1] Most scoria is composed of glassy fragments, and may contain phenocrysts. The word scoria comes from the Greek σκωρία, skōria, rust. A colloquial term for scoria is cinder.[2][3]

Other Languages
العربية: سكوريا
Esperanto: Fandskorio
français: Scorie
한국어: 스코리아
Bahasa Indonesia: Skoria
íslenska: Gjall
italiano: Scoria
עברית: סקוריה
Bahasa Melayu: Scoria
Nederlands: Scoria
日本語: スコリア
polski: Scoria
sicilianu: Scorcia (scoria)
svenska: Scoria
Tiếng Việt: Scoria (đá)
中文: 火山渣