an important suppliant to reservoir water in the city of Perth and elsewhere. The Yarragadee Formation, one of the thickest formations in the basin, is a very good aquifer in the southern part of the basin. The Perth Basin contains Permian and Jurassic coal measures, the most important being mined primarily for electricity generation in the Collie Sub-basin at Collie in the south-west of the state. The Perth Basin is also prospective for natural gas and oil, with recent exploration wells, including Origin Energy/Arc Energy's Hovea 2, confirming large resources of natural gas, but difficult reservoir geology and characteristics have prevented the full utilisation of these energy reserves. The oil is sourced from the Kockatea Shale. Currently, a junior minerals exploration company is exploring the basin north of Perth for glauconite to produce potash fertilizer. Regions Due to its shape and size, the basin has been surveyed and studied in distinctions such as offshore and onshore, north south, and central See also Darling Scarp South West Seismic Zone References Bibliography Yarragadee Aquifer Geology report, 115kb pdf Further reading Raine, M. J. and K.G. Smith (1972) Bibliography of the Perth Basin, Western Australia Canberra : Bureau of Mineral Resources, Geology and Geophysics, report ; no. 157. Prepared by the Petroleum Exploration Branch of the Bureau of Mineral Resources, with assistance from the Geological Survey of Western Australia. External links Cliff Head Oil Field, Roc Oil 3D-GEO Australia: Multiple Regional Studies completed over the last 10 years. Currently we have a full in-house study. Sedimentary basins of Australia Geology of Western Australia Swan Coastal Plain