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RB 91/00112 Rhyolite from drillhole near Mount Monster, southeast region of South Australia.
A drilling intersection of 6.5 metres near outcrop of the acid porphyry at Mount Monster is almost certainly part of the same suite. The rock contains phenocrysts of feldspar and quartz in a fine grained to microcrystalline groundmass of potash...-
Document
Published: 01 Nov 1991
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RB 2007/00012 Mount Monster rhyolite deposit near Keith - potential resumption of quarrying.
Over the period from 1955 until 1976 an outcrop of Ordovician porphyritic rhyolite was quarried for road-sealing aggregate and rail ballast from two quarries at Mount Monster, 12 km south of Keith. The total recorded production was 548,000 tonnes....-
Document
Published: 01 May 2007
