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.
Source: wiktionary
Orthoquartzite
//ˌɔːθəʊˈkwɔːtˌsaɪt//
Synonyms for "orthoquartzite"
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Sample sentences
3 total sentences available.
A similar phenomenon on a smaller scale occurs at Hole-in-the-Wall, where beds of orthoquartzite show large bulbous projections on their undersides which appear to squeeze out the underlying shale.
Source: wiktionary
In the central part of the outcrop area of the formation, a 4.5 km–wide, east-trending belt contains strata like that of the northern part of the formation except that orthoquartzite beds up to 6m thick, which commonly have strike lengths of 1–2 km, are present.
Source: wiktionary
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.