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/ˌɔːθəʊˈkwɔːtˌsaɪt/ · 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.
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.
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.
Use orthoquartzite when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Orthoquartzite means A very pure quartz sandstone composed of usually well rounded quartz grains cemented by silica..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
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.
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