Mica schist


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(Geol.) a schistose rock, consisting of mica and quartz with, usually, some feldspar.

See also: Mica

References in periodicals archive ?
The rocks formed along the suture zones are metamorphosed quartz mica schist showing anhedral stressed quartz grains embedded in the laths of coarse grained mica, mainly muscovite.
The emeralds from Santa Terezinha (Brazil) formed in metasomatized mica schist related to hydrothermal fluids along thrust fault associated with pegmatite veins (Giuliani et al., 1997a,b); 3) related to black shale with veins and breccias controlled by thrusts and faults (Beus, 1979; Dereppe et al., 2000; Schwarz and Giuliani, 2001).
A number of blocks of the local green mica schist from the long disused Jersey Quarry on Holyhead Mountain are to be used for the memorial which will be erected on Newry Beach this spring.
The uppermost layer consists of mica schist measuring from 30 to 40 meters thick.
Granite and mica schist abound in New England while limestone dominates Kentucky and the Midwest.
Here the green beryl, which is coloured by Cr, occurs within mica schist close tn its contact with quartz veins spawned by a nearby granite intrusion (Groat et al., 2002, p.
Once standing, the tub wall was supported by 1,500 tiebacks, long steel rods anchored to a sturdy rock layer called mica schist, or bedrock, 70 feet below sea level.
The Groveland area is a syncline which consists of Middle Precambrian Randville dolomite overlain by Felch Formation (mica schist and amphibolite), Vulcan Iron Formation, and red Cambrian sandstones.
TABLE 1 Soil Groups (5) Soil Group Parent material Chandler/Talledaga Hard talcose schist and mica schist Chester Micaceous schist; white quartzite present on uplands Edgemont Quartz schist, quartzitic sandstone, quartzite conglomerate, pure quartzite Glenelg/Chester Micaceous schists Hagerstown/Duffield Limestone Highfield Metabasalt with considerable quartzite Linganore Hard slaty schist or phyllite Manor/Glenelg Thin, platty schistose rock Myersville/Fauquier Metabasalt Penn/Readington/Croton Red, Triassic-age sandstone and shale
garnetiferous schist, quartz-mica schist, calcareous schist, schistose marble, hornblende bearing quartz mica schist and micaceous marble.
In order of abundance the schist consists of quartz mica schist, graphitic schist and quartzite layers.