377 by F. L. Sutherland & G. Webb Minerals of western Tasmania ........................................the Moonta and Wallaroo mining districts, South Australia ................................................University of Wollongong Wollongong, N.S.W. 2500 Australia Thomas G. Vallance Department of Geology University...University of Sydney Sydney, N.S.W. 2006 Australia INTRODUCTION Australia, the island continent with a land...among the top three producers of gold, lead, zinc, silver, nickel, manganese, precious opals, sap phires |