A lava containing more silica than basalt; much more viscous as a result It usually weathers into a light gray color Occurs in the postshield stage in some Hawaiian volcanoes
Fine-grained, transitional, evolved igneous rock Mainly composed of alkali feldspar
Light-coloured, very fine-grained igneous rock composed chiefly of alkali feldspar with only minor mafic minerals (biotite, hornblende, or pyroxene). Trachyte is commonly found in volcanic regions; like many volcanic rocks, it shows a streaked or banded structure due to flowing of the congealing lava
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Definition von trakit im Türkisch Türkisch wörterbuch