metamorphic facies
noun
1.
Geology.
a group of metamorphic rock units characterized by particular mineralogic associations.
Examples from the web for
metamorphic facies
To a considerable extent, the
metamorphic facies
of rocks having amphibolite composition can be traced on magnetic maps.
We do not define the
metamorphic facies
, at this stage, because that would involve numerous debates on their boundaries.
metamorphic facies
or grade as provided by the sample submitter.