oxidized shale

oxidized shale

[′äk·sə‚dīzd ′shāl]
(mining engineering)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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The research carried out in the forties had showed that natural weathering leads to significant, up to 45% leaching of uranium from the oxidized shale. USSR Ministry of Geology therefore proposed in 1950 to use this natural process for uranium production through natural leaching (M.N.