rhyolite

Definitions

  • WordNet 3.6
    • n rhyolite very acid volcanic rock
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Webster's Revised Unabridged Dictionary
    • n Rhyolite (Min) A quartzose trachyte, an igneous rock often showing a fluidal structure.
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Century Dictionary and Cyclopedia
    • n rhyolite The name given by Richthofen to certain rocks occurring in Hungary which resemble trachyte, but are distinguished from it by the presence of quartz as an essential ingredient, and also by a great variety of texture, showing more distinctly than rocks usually do that the material had flowed while in a viscous state. The name liparite was given later by J. Roth to rocks of similar character occurring on the Lipari Islands. Non-vitreous rocks of this kind had previously been called trachytic porphyries, and they have also been designated as quartz-trachytes. Later Richthofen proposed the name of nevadite (also called granitic rhyolite by Zirkel) for the variety in which large macroscopic ingredients, like quartz and sanidine, predominated over the ground-mass, retaining the name liparite, and applying it to the varieties having a porphyritic or felsitic structure, and limiting the term rhyolite to the lithoidal and hyaline modifications, such as obsidian, pumice-stone, and perlite; and nearly the same nomenclature was adopted by Zirkel. Rosenbusch recognizes as structural types of the rhyolitic rocks nevadite, liparite proper, and glassy liparite, remarking that these names correspond closely to Zirkel's nevadite, rhyolite, and glassy rhyolite respectively. These rocks are abundant in various countries, especially in the Cordilleran region, and are interesting from their connection and association with certain important metalliferous deposits. See cut under axiolite.
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Chambers's Twentieth Century Dictionary
    • n Rhyolite rī′ō-līt an igneous rock, called also Liparite and Quartz-trachyte
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Etymology

Webster's Revised Unabridged Dictionary
Gr. "rei^n to flow + -lite,
Chambers's Twentieth Century Dictionary
Gr. rhyax, a stream, lithos, a stone.

Usage

In literature:

Fifty yards away and in full sight of the cabin, the mouth of a tunnel yawned blackly under a rhyolite ledge.
"The Trail of the White Mule" by B. M. Bower
Surface eruption of quartz-porphyry, rhyolite, and andesite.
"History and Comprehensive Description of Loudoun County, Virginia" by James W. Head
Maul from broken rubbing stone or grinder, grooved at each end; rhyolite.
"Illustrated Catalogue Of The Collections Obtained From The Indians Of New Mexico And Arizona In 1879" by James Stevenson
We finally settled for rhyolite and obsidian.
"Question of Comfort" by Les Collins
It then cools quickly and forms finely crystalline rocks of the rhyolite and basalt types.
"The Economic Aspect of Geology" by C. K. Leith
This was all that remained of New Rhyolite.
"Two Thousand Miles Below" by Charles Willard Diffin
The oldest volcanic rock appears to be rhyolite, which peers up in two small hills almost smothered beneath the lake deposits.
"Volcanoes: Past and Present" by Edward Hull
Rhyolites were erupted locally near Tardree, Ballymena and Glenarm.
"Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 2" by Various
Granite is an acidic rock corresponding to rhyolite in chemical composition.
"The Elements of Geology" by William Harmon Norton
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In news:

One of the many rhyolite flows that have erupted at Yellowstone during its history.
It turns out arrowheads can be made of argillite, chalcedony, chert/flint, diorite, hematite, jasper, rhyolite, siltstone, crystal quartz, quartz, and quartzite.
The formations of Chiricahua National Monument are the result of a large-scale volcanic event, a mixture of ash and pumice that fused into a tuff of rhyolite and eroded over time.
SEE ALL 1 ACTIVITIES IN RHYOLITE.
Hwy 374 Rhyolite, NV, 89003, United States.
Peruse a 24-hour outdoor sculpture park near Rhyolite, Nev.
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In science:

Tertiary intrusive rocks, mainly rhyolite-phonolite dikes, are fairly abundant in the district.
Reference Design Project Book: NUSEL-Homestake
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