gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1985.049.350.23 Short Communications An Occurrence of ɛ-FeOOH in a Black Shale Ostwald J. Broken Hill Proprietary Co. Ltd., Central Research Laboratories, P.O. Box 188, Wallsend, NSW 2287, Australia 3 1985 49 350 139 140 6 6 1984 Copyright © 1985, The Mineralogical Society 1985 ɛ-FeOOH shale Pilbara Western Australia