Labelled “Rum Jungle Copper Mine”. Drill core segment 48mm in diameter from the 1960s. Dolomite crystals in a cavity. The Coomalie dolomite/magnesite dolostone is Precambrian and includes vuggy recrystallised zones (from metamorphic recrystallisation), and formed from stromatolites. It underlies some of the Rum Jungle mines.
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