Sedimentary rocks (Clarence-Moreton Basin)
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The Clarence–Moreton Basin contains layered formations of Triassic and Jurassic sedimentary rocks of variable grain size and permeability. Sedimentary rocks may store and transmit groundwater through inter-granular pore space, fractures and weathered zones. Sedimentary rocks with coarser grain size, for example the Woogaroo Subgroup, are generally more permeable than those with finer grain size such as the Walloon Coal Measures. Groundwater tends to discharge locally from the sedimentary rock aquifers typically along foot slopes and drainage lines. Younger rocks such as the Lamington Volcanics and unconsolidated deposits like Quaternary alluvium may overlie the sedimentary rocks of the Clarence–Moreton Basin and these are depicted in other conceptual models. The direction of groundwater flow is uncertain in the deeper strata of the Clarence-Moreton Basin.
Sedimentary rock aquifers may provide a range of ecosystems with water required to support their fauna and flora communities, ecological processes and delivery of ecosystem services.
Last updated: 18 December 2015
This page should be cited as:
Sedimentary rocks (Clarence-Moreton Basin), WetlandInfo 2013, Queensland Government, Queensland, viewed 20 December 2017, .