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Published online by Cambridge University Press: 01 May 2009
The area covered by Permian formations in the vicinity of Irwin River, Western Australia (see Text-fig. 1) has been visited many times by members of the Department of Geology, University of Western Australia, with parties of students for field instruction in mapping. In 1939 the author collected a suite of specimens from the principal beds of the Coal Measure Series for heavy mineral investigations, the results of which are recorded in this paper.