gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1920.019.89.02 On Gearksutite at Gingin, Western Australia1 Simpson Edward S. D.Sc., B.E., F.C.S. Government Mineralogist and Chemist, Geological Survey of Western Australia

Published by permission of A. Gibb Maitland, Government Geologist.

 5 1920 19 89 23 39 Copyright © 1920, The Mineralogical Society 1920 Summary

A description is given of the occurrence of gearksutite under novel conditions, viz. in Cretaceous greensand, at Gingin in Western Australia. Some additions are made to the previously known physical and chemical properties of the mineral and a new suggestion is put forward as to its constitution. Its genesis is discussed and theories put forward to account for its origin under the previously known and newly discovered conditions.