gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1998.62.4.02 Book Reviews Ordovician K-bentonites of Eastern North America Morgan D.J. 8 1998 62 4 575 576 Kolata D. R. Huff W. D. Bergström S. M. Ordovician K-bentonites of Eastern North America 1996 0-8137-2313-2 313 Geological Society of America Special Paper, v+84 pp., Price US$46.00 (post paid) Copyright © 1998, The Mineralogical Society 1998