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Typical Minerals
Minerals too small to identify (except phenocrysts). Composition will be from bottom of Bowen's Reaction series (i.e. felsic).
     A fine grained (aphanitic) igneous rock, white, light gray, pink, to dark in color. Phenocrysts (large visible crystals) are often present
      Since color is such a poor indicator of rock identification in most cases, darker rhyolites can be confused with lighter andesites. Felsite is the general term for an unidentifiable, fine grained, generally middle colored rock.
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Tectonic Association
     Rhyolite, as with all felsic rocks, is found on continents, ejected from volcanoes.
   Tectonic Cross Section - pdf version

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