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Trachybasalt

Potassic trachybasalt from the July–August 2001 eruption of Mount Etna, Italy
Satellite image of Bayuda volcanic field in Sudan where nepheline-rich trachybasalt lavas have been erupted during the Holocene epoch[1]

Trachybasalt is a volcanic rock with a composition between trachyte and basalt. It resembles basalt but has a high content of alkali metal oxides. Minerals in trachybasalt include alkali feldspar, calcic plagioclase, olivine, clinopyroxene and likely very small amounts of leucite or analcime.[2]

  1. ^ "Bayuda Volcanic Field". Global Volcanism Program – Volcanoes of the World database. Smithsonian Institution. 5 June 2020. Retrieved 6 August 2020.
  2. ^ Trachybasalt

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