orthoquartzite

/ˌɔːθəʊˈkwɔːtˌsaɪt/

orthoquartzite means A very pure quartz sandstone composed of usually well rounded quartz grains cemented by silica.

orthoquartzite is pronounced /ˌɔːθəʊˈkwɔːtˌsaɪt/.

Etymology

From ortho- + quartzite.

noun

A very pure quartz sandstone composed of usually well rounded quartz grains cemented by silica.“The contact with the Fountain is sharply defined, since they consist essentially of fine-grained red or pink to white sandstone, at time cemented to an orthoquartzite—a process still continuing.”