orthoquartzite
Geology
noun
(Originally) a quartzite formed from sandstone by infiltration and pressure; (now) an unmetamorphosed sedimentary rock consisting of quartz grains cemented with silica.
Origin
1920s; earliest use found in Journal of Geology.
- Montpellier butter
- Montpellier green
- Montpellier maple
- Montpellier snake
- Montpellier yellow
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- montroydite
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