Abstract

"The mineralogy of specimens of greensand, chalk, and sandstone from the Upper Cretaceous sediments at Gingin, 50 miles north of Perth, Western Australia is described. The heavy detrital minerals occurring in these sediments are: magnetite, ilmenite, leucoxene, zircon, tourmaline, rutile, kyanite, sillimanite, staurolite, andalusite, garnet, amphibole, epidote, zoisite, sphene, spinel, monazite, biotite, and anatase. This assemblage has been derived from the pre-Cambrian shield to the east of Gingin. The conditions of deposition of the greensands and chalk are discussed, and mechanical analyses of the greensands are given."

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