gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1967.036.277.25 Erratum Moore Paul B. Smith Joseph V. Department of the Geophysical Sciences, University of Chicago, Chicago, Illinois, U.S.A. 3 1967 36 277 144 144 24 11 1966 Copyright © 1967, The Mineralogical Society 1967