low quartz

low quartz

[′lō ′kwȯrtz]
(mineralogy)
Quartz that has been formed below 573°C; the tetrahedral crystal structure is less symmetrically arranged than a quartz formed at a higher temperature.
References in periodicals archive ?
Eagle Ford Shale is mainly clay-rich limestone with low quartz content making less brittle than typical shale reservoirs (Barnett), yet with high fracturing capability.