Tachylite from Kīlauea volcano in Hawaii (view is about 9 cm across). Tachylite (/ ˈ t æ k ə l aɪ t / TAK-ə-lyte; also spelled tachylyte) is a form of basaltic volcanic glass.This glass is formed naturally by the rapid cooling of molten basalt. It is a type of mafic igneous rock that is decomposable by acids and readily fusible. [citation needed] The color is …

Tachylyte, glassy igneous rocks low in silica, such as basalt or diabase. Tachylytes are black with a pitchlike or resinous lustre; in thin sections they are characteristically brown and translucent, and the glass is crowded with granules of magnetite. Tachylytes are found only under conditions

Tachylite, also spelt tachylyte, is a black or dark brown, opaque basaltic glass. The term may refer to an interstitial glass or a rock composed mostly of such glass. Another definition: A glassy basalt usually containing magnetite microlites and generally occurring as the selvages of dykes and sills. Compare also pseudotachylyte.

2023年12月15日 · Being glassy, tachylyte doesn’t have minerals except for the minute Fe-Ti oxide crystals or magnetite. Besides magnetite, it may have a small amount of other microlites like feldspar or olivine. However, we call it mafic since it forms basaltic magmas. These magmas form basalt (fine-grained), diabase (medium-grained), or gabbro (coarse ...

2009年9月11日 · tachylyte. tachylyte, glassy igneous rocks low in silica, such as basalt or diabase. Tachylytes are black with a pitchlike or resinous lustre; in thin sections they are characteristically brown and translucent, and the glass is crowded with granules of magnetite. Tachylytes are found only under conditions that imply rapid cooling, and they are ...

Tachylyte is a volcanic glass that forms within low-silica, basalt flows while obsidian comes from high-silica, usually rhyolitic, eruptions. Vitrophyric is a textural term used to describe an igneous rock that has a glassy groundmass with conspicuously large crystals. The low-quality and dispersed nature of these toolstones are reflected in ...

Learn how tachylyte forms, its properties, and why it is significant in the study of volcanic rocks. Discover the definition, origins, and geological importance of tachylyte, a fine-grained volcanic glass.

Define tachylyte. tachylyte synonyms, tachylyte pronunciation, tachylyte translation, English dictionary definition of tachylyte. also tach·y·lite n. A brown, black, or green volcanic glass formed from basaltic magma and often found along the edges of dikes, sills or volcanic flows,...

Tachylite ( TAK-ə-lyte; also spelled tachylyte) is a form of basaltic volcanic glass. This glass is formed naturally by the rapid cooling of molten basalt. It is a type of mafic igneous rock that is decomposable by acids and readily fusible. The color is a …

A black basaltic glass often found on the edges of intrusions of basalt.... Click for English pronunciations, examples sentences, video.