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  • ...knows about sand. He said it was highly unusual because it did not contain quartz and it was not stream sand or beach sand or residue from mining or anything
    32 KB (5,602 words) - 14:56, 13 avril 2010
  • * la compression des roches notamment cristallines (celles riches en quartz), engendrerait de la piezo-électricité,
    15 KB (2,516 words) - 13:04, 27 mai 2022
  • * ! 1981/03/16 CRACOE FELL,ENGL: Sun reflects on quartz on cliffside. Cops++ fooled. /BUFORA
    58 KB (7,369 words) - 00:35, 1 avril 2010
  • * the compression of in particular crystalline rocks (those rich in quartz), would generate piezoelectricity, ...lithologies and on the extrinsic thermomechanical regime. The quantity of quartz in the crust, is also a factor of stress increase.]]
    28 KB (4,369 words) - 13:10, 27 mai 2022