arkosic bentonite

arkosic bentonite

[är′kōs·ik ′ben·tə‚nīt]
(petrology)
Bentonite derived from volcanic ash which contains 25-75% sandy impurities and whose detrital crystalline grains remain essentially unaltered. Also known as sandy bentonite.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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