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Very acid volcanic rock
Answer for the clue "Very acid volcanic rock ", 8 letters:
rhyolite
Word definitions for rhyolite in dictionaries
The Collaborative International Dictionary
Word definitions in The Collaborative International Dictionary
Rhyolite \Rhy"o*lite\, n. [Gr. "rei^n to flow + -lite.] (Min.) A quartzose trachyte, an igneous rock often showing a fluidal structure. -- Rhy`o*lit"ic ,, a.
Wikipedia
Word definitions in Wikipedia
Rhyolite is an igneous , volcanic rock , of felsic ( silica -rich) composition (typically > 69% SiO—see the TAS classification ). It may have any texture from glassy to aphanitic to porphyritic . The mineral assemblage is usually quartz , sanidine and plagioclase ...
Wiktionary
Word definitions in Wiktionary
n. (context geology English) An igneous, volcanic (extrusive) rock, of felsic composition, with aphanitic to porphyritic texture.
WordNet
Word definitions in WordNet
n. very acid volcanic rock
Usage examples of rhyolite.
Suhl, about forty miles to the east, to see igneous granites, rhyolites, and andesites, as well the copper mines of nearby Goldlauter.
If there's time, the students might venture as far as Suhl, about forty miles to the east, to see igneous granites, rhyolites, and andesites, as well the copper mines of nearby Goldlauter.
If there's time, the students might venture as far as Suhl , about forty miles to the east, to see igneous granites, rhyolites, and andesites, as well the copper mines of nearby Goldlauter.
Far from the silver soccer balls, Rhyolite was a complex microwave receiver the size of a minibus with a large dish-shaped antenna pointed at earth.