mineral facies

mineral facies

[′min·rəl ′fā‚shēz]
(petrology)
Rocks of any origin whose components have been formed within certain temperature-pressure limits characterized by the stability of certain index minerals.
References in periodicals archive ?
In order to analyze the degradation products of the concrete, XRD tests were conducted to investigate the main mineral facies of all the concrete samples.
Very low-grade metamorphism of volcanic and volcaniclastic rocks-mineral assemblages and mineral facies. In Low temperature metamorphism.
(1987) Very low grade metamorphism of volcanic and volcaniclastic rocks - mineral assemblages and mineral facies, in FREY, M., ed., Low Temperature Metamorphism, 59-113.