Trachybasalt

Trachybasalt is a volcanic rock with a composition between trachyte and basalt. Minerals included in trachybasalt include alkali feldspar, calcic plagioclase, olivine, clinopyroxene and likely very small amounts of leucite or analcime.[1] It contains high alkali content (5 to 7% Na2O + K2O, see TAS diagram).

References

  1. ^ Trachybasalt
Types of basalts
Basalts by tectonic setting
Basalts by form and flow
Basalts by chemistry
Important minerals