Nature conservation

Biodiversity Reform

Channel Country - subregions

Subregions of the Channel Country Bioregion
SubregionGeologyCharacteristic landformsTypical soilsVegetation
BullooQuaternary clays and sands of the Bulloo River floodout.Channels and floodplains, clay playas with beaches and lunettes, marginal sandplains and dunes.Saline cracking grey clays. Siliceous sands on dunes, more complex but poorly known loams and sands on lunettes. Canegrass and ephemerals on clays. Canegrass, lignum with some black box on lake margins. Sparse mulga, whitewood and old man saltbush on sands.
Core RangesPre-Cambrian and Cambrian schist, slate and volcanics intruded by Devonian granodiorite. Fringing Jurassic sandstones.Low ranges and rounded hills. Strong control by geology, prominent rounded tors on the granodiorite. Low angle stony slopes and dendritic drainage. Shallow stony profiles on ranges, contour banded and gibber covered lower slopes. Open bluebush with sandalwood, dead finish, western pittosporum, copperburr and sparse mulga.
Tibooburra Downs Cretaceous claystones and Cretaceous sandstones capped by Tertiary silcrete. Quaternary slope mantles and alluvium. Undulating plains with defined creek lines extending to floodouts. Plateaus, tablelands and mesas with prominent low scarps of silicified rock. Low colluvial slopes to floodout areas.Deep brown loamy clays and sticky grey green clays, some texture contrast soils. Brown and grey clays in alluvium. Stony, contour banded lower slopes. Brown clays and texture contrast soils in alluvium.Mitchell grass and forbs in good seasons. Often bare coolabah, river red gum, gidgee, black box, river cooba and chenopods along creeks and in floodouts. Sparse mulga, gidgee and belah with bluebush and saltbush on tablelands. Mitchell grass on slopes. Floodouts similar to Central Downs.

From Morgan and Terrey 1992

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Page last updated: 26 April 2016