The geology (Figure 2) within the project area is dominated by the Chinaman Creek Limestone unit which hosts the white marble and other Dimension Stone.
Chinaman Creek unit is described as “Bioclastic calcarenite, calcirudite and calcilutite commonly richly fossiliferous), mudstone, impure sandy limestone, mudstone (commonly calcareous and fossiliferous), lithofeldspathic, subfeldspathic and quartzose sandstone, and lymictic conglomerate”.
Various carboniferous rhyolites have intruded the limestone unit and this has resulted in localised metamorphism giving rise to various types of dimension stone.
Other geological units shown in Figure 2 include:
Shield Creek Formation – feldspathic to quartzose sandstone and minor conglomerate, siltstone and mudstone; local bioclastic calcarenite (richly fossiliferous).
Tank Creek Sandstone -open shallow-water carbonate shelf, lagoonal and barrier shoal deposits, mixed or interbedded with muddy and locally sandy siliciclastic deposits.
Bulgeri Formation – sandstones and conglomerates derived from plutonic, metamorphic and sedimentary rock sources, typically greyish-red siltstone and very fine sandstone.
Quinton Formation – Lithofeldspathic arenite, polymictic conglomerate and mudstone; minor volcaniclastic arenite and siltstone; local limestone (mainly calcilutite and fine grained calcarenite).