quartzite
(noun)
Ametamorphic rock consisting of interlocking grains of quartz.
Examples of quartzite in the following topics:
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Paleolithic Artifacts
- The Venus, a 2.3 inch long piece of quartzite rock dated between 300,000 and 500,000 years ago during the Middle Paleolithic, was discovered in 1999 in a river terrace deposit on the north bank of the Draa River, just south of the Moroccan village of Tan-Tan.