Examples of rhyolite

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Units are listed in stratigraphic order in the legend (excluding rhyolites, which contain several units).
The rhyolite has the form of a variably welded and massive, crystal-rich ignimbrite and associated non-welded pyroclastic deposits.
This group consists of six relatively dense rhyolite samples.
Siltstones plot in similar fields to sandstones of corresponding age, though slightly displaced towards average rhyolite.
The rhyolites commonly contain phenocrysts of alkali feldspar that are limpid and unaltered.
The basalt could represent a rare erupted part of the basaltic underplate that acted as the heat source for local generation of the rhyolites.
They interpreted the rhyolites to have been formed by partial melting of andesitic crust of the arc.
These ignimbrites have 40 to 50 % phenocrysts set in a highsilica rhyolite glass.
In crystalpoor rhyolite magma like that modelled here, crystal settling will not be greatly hindered by interference with other crystals.
Generation of icelandic rhyolites by melting of plagiogranites in the oceanic layer.
The rock fragments are mainly rhyolite, granite, and spherulite of rhyolite, with very small amounts of muscovite-quartz schist and hornfels exhibiting a granoblastic texture.
The levels of elephant utilization and tree pushing were also determined for the four main geological substrates, basalt, granite, rhyolite and gabbros.
Monotonous dacites are very large volume ignimbrites that are consistently water-enriched and cool by comparison to the hot, dry rhyolites described here.
It suggests that the dominant original composition was andesitic to rhyodacitic, and that differentiation to rhyolite was not common.
The rhyolites show extended range of compositions consistent with strong differentiation.

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