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mica schist |
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mica schist [′mī·kə ‚shist] (petrology) A schist which is composed essentially of mica and quartz and whose characteristic foliation is mainly due to the parallel orientation of the mica flakes. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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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. 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 hole then passed into oxidized quartzite and quartz mica schist from 50 feet to termination depth. |
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