1. 
   Trachybasalt
   An extrusive rock intermediate in composition between trachyte and basalt.
   Found op http://midju.tripod.com/glossary.html
   
   
2. 
   Trachybasalt
   An extrusive rock intermediate in composition between trachyte and basalt.
   Found op http://volcano.oregonstate.edu/education/glossary.html
   
   
3. 
   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. It contains high alkali content (5 to 7% Na2O + K2O, see TAS di...
   Found op http://en.wikipedia.org/wiki/Trachybasalt
   
   

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