GEOLOGICAL SPECIMENS ROCK TRACHYTE

  • RM6471-01

Trachyte is an extrusive igneous rock composed mostly of alkali feldspar. It is usually light-colored and fine-grained, with minor amounts of mafic minerals, and is formed by the rapid cooling of lava enriched with silica and alkali metals. It is the volcanic equivalent of syenite.

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GEOLOGICAL SPECIMENS ROCK TRACHYTE

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