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	Great Artesian Basin
		The Great Artesian Basin is a 1.7 million square kilometre bed of porous water holding sedimentary rock lying on average 1000meters beneath most of northeastern Australia (22% of Australia’s total land area).
		The basin was created during the Mesozoic period, 65 to 248 million years ago, where the area slumped under the weight of an Inland Sea and it's deposits.
		It is sealed in the basin by impervious rock layers (aquitard).
	www.diamantina-tour.com.au /outback_info/great_artesian_basin/gab_index.htm (281 words)

	Tas Walker's Biblical Geology - Application to GAB
		Together with some associated peripheral basins it covers a significant portion of the Australian continent and is, indeed, the largest artesian basin of its kind in the world.
		Artesian water is held under pressure in porous sandstone aquifers capped by impervious shale beds.
		The effect of this erosion is illustrated in the adjacent cross-section of the Great Artesian Basin.
	www.biblicalgeology.net /model/gab.html (1904 words)

	Great Artesian Basin - Encyclopedia.com
		Great Artesian Basin c.670,000 sq mi (1,735,300 sq km), between the Eastern Highlands and the Western Plateau, E central Australia, extending S from the Gulf of Carpentaria, Queensland, to NE South Australia and N New South Wales.
		The arid basin receives water from the Eastern Highlands as rain is absorbed by porous rock and flows underground toward the center of the saucer-shaped basin.
		The `discovery' in 1878 of Australia's Great Artesian Basin was a turning point for pastoralism and conservation...
	www.encyclopedia.com /doc/1E1-GreatArt.html (1003 words)

	Mound springs in arid Australia
		However, natural springs called mound springs, that are fed by the Great Artesian Basin, are home to a diverse array of unique and unusual aquatic invertebrates and fishes.
		Artesian water, stored in deep aquifers, reaches the surface through fault lines in the overlying rock.
		Many springs have disappeared in the last 100 years as a result of water extraction from the Great Artesian Basin, probably resulting in the extinction of unique species before they were even discovered.
	www.austmus.gov.au /factsheets/mound_springs.htm (388 words)

	Spartanburg SC \| GoUpstate.com \| Spartanburg Herald-Journal
		The basin is 3000 metres (10,000 ft) deep in places and is estimated to contain 64,900 cubic kilometres of groundwater.
		The water of the GAB is held in a sandstone layer laid down by continental erosion of higher ground during the Triassic, Jurassic, and early Cretaceous periods.
		After European occupation, the Great Artesian Basin became an important water supply for cattle raising, irrigation, and stock and domestic usage, and is a vital life line for rural Australia.
	www.goupstate.com /apps/pbcs.dll/section?category=NEWS&template=wiki&text=Great_Artesian_Basin (927 words)

	Tas Walker's Biblical Geology - Application to GAB
		Together with some associated peripheral basins it covers a significant portion of the Australian continent and is, indeed, the largest artesian basin of its kind in the world.
		The effect of this erosion is illustrated in the adjacent cross-section of the Great Artesian Basin.
		Elsewhere on the Great Artesian Basin the uppermost sediments of the sequence have been eroded by the receding Flood water to reveal earlier deposited strata, forming a gently undulating rolling downs topography.
	biblicalgeology.net /content/view/30 (1894 words)

	Information step A2b - Processes effecting dryland salinity in the Great Artesian and Darling basins
		The GAB is an enormous groundwater Basin that includes large areas of Queensland and South Australia along with parts of northern NSW and parts of the Northern Territory.
		The GAB was formed through subsidence in the Mesozoic era, and it is separated in the south from the younger Murray Basin by the uplifted rocks of Lachlan Fold belt.
		The Darling Basin is formed of alluvial sediments of Cainozoic age deposited within many of the major river valleys of the Darling surface water Basin in both northern NSW and southern Queensland.
	www.ndsp.gov.au /salinitytools/salinity_information/basin_sheets/A2b.html (720 words)

	MDBC Intranet
		Covering by far the largest area are the sedimentary basins, in particular the Great Artesian Basin and the Murray Basin, which are the major groundwater resources of the MDB.
		The Great Artesian Basin (GAB) is one of the largest such basins in the world, with a total area of 1.7 million km2, covering 22 per cent of Australia (Figure 3).
		It is a relatively thin saucer-shaped basin, between 200 and 600 m thick, consisting of Cainozoic age unconsolidated sediments and sedimentary rocks, primarily silts, clays and limestones.
	www.mdbc.gov.au /subs/eResource_book/chapter2/p4.htm (859 words)

	Great Artesian Basin
		The Great Artesian Basin provides the only reliable source of water through much of inland Australia and is the largest artesian basin in the world.
		The basin is 3000 metres deep in places and contains an estimated 8700 megalitres of groundwater.
		Overusage of the basin's water has led to a decline in the water pressure available, a source of great concern to water users as, if left unchecked, would mean that bores might go dry (or, at best, require water to be actively pumped out).
	www.xasa.com /wiki/en/wikipedia/g/gr/great_artesian_basin.html (356 words)

	Australia's Artesian Basin - $14 Billion down the drain each year - On Line Opinion - 15/8/1999
		The traditional view of the Great Artesian Basin, which is the basis of government policies and which is taught in schools, is that the aquifer is a porous rock where the water content is continuously replenished by slow seepage from the strata outcrops in the uplands to the east.
		The present interpretation is based on the assumption that the Jurassic sandstones are porous, and that the porosity is unchanged by the discharge of water from the basin, or by the drop in water pressure.
		When the Great Artesian Basin was first penetrated by bores, the water gushed out at high pressures and high discharges, the fountains extending 100 feet and more into the air.
	www.onlineopinion.com.au /view.asp?article=993 (2654 words)

	Middle Years Science Program
		The Great Artesian Basin is one of the largest artesian (underground water) groundwater basins in the world.
		The Great Artesian Basin was formed between 100 and 250 million years ago and consists of layers of sandstone aquifers and water resistant siltstones and mudstones.
		Dating of the artesian waters has given ages of almost 2 million years for the oldest waters, which occur in the south-western area of the Basin.
	www.jpc.vic.edu.au /smp/factartesian.htm (359 words)

	Spring wetlands of the Great Artesian Basin
		The Great Artesian Basin (GAB) is a vast aquifer comprised of porous sandstone spanning a huge portion of the continent.
		The water emanating from the Great Artesian Basin feeds spring wetlands that can be distinguished from other wetlands in dry landscapes because of their permanent water source.
		However, emerging demands on Great Artesian Basin groundwater, particularly from the mining sector and future groundwater allocations will have to be carefully controlled to avoid compromising the natural values of the springs.
	www.environment.gov.au /soe/2006/emerging/wetlands/index.html (827 words)

	Tas Walker's Biblical Geology - Great Artesian Basin
		To the north is the Carpentaria Basin and the smaller Laura Basin.
		In the south-east is the Surat Basin, the Moreton Basin and the Clarence Basin.
		The Great Artesian Basin was deposited during the upper Zenithic phase, the top of the structure in the Surat Basin area representing the top of the Zenithic phase in eastern Australia.
	biblicalgeology.net /content/view/17 (4457 words)

	AllRefer.com - Great Artesian Basin, Australia & New Zealand (Australian And New Zealand Physical Geography) - ...
		Great Artesian Basin, c.670,000 sq mi (1,735,300 sq km), between the Eastern Highlands and the Western Plateau, E central Australia, extending S from the Gulf of Carpentaria, Queensland, to NE South Australia and N New South Wales.
		The arid basin receives water from the Eastern Highlands as rain is absorbed by porous rock and flows underground toward the center of the saucer-shaped basin.
		The highly mineralized artesian water cannot be used for agriculture.
	reference.allrefer.com /encyclopedia/G/GreatArt.html (246 words)

	Great Artesian Basin Sustainability Initiative - DAFF (Site not responding. Last check: )
		In most areas of the Great Artesian Basin, the water is under sufficient pressure to provide a naturally flowing source when tapped by the drilling of bores.
		Traditionally, artesian water that came to the surface under natural pressure was allowed to flow uncontrolled into open (uncovered) drains and creeks for distribution to stock.
		The Strategic Management Plan was endorsed by all jurisdictions in the Great Artesian Basin and was formally launched in Longreach on 13 September 2000 by the then Minister for Agriculture, Fisheries and Forestry, the Hon Warren Truss MP on behalf of the states and the Northern Territory and the Australian Government Ministers.
	www.daffa.gov.au /natural-resources/water/great-artesian-basin (694 words)

	The Great Artesian Basin
		The Basin covers a total area of over 1 711 000 square km and it has an estimated total water storage of 64 900 million megalitres (a megalitre is one million litres and is equivalent to about half the water in an Olympic swimming pool).
		The Great Artesian Basin was formed between 100 and 250 million years ago and consists of alternating layers of waterbearing (permeable) sandstone aquifers and non-waterbearing (impermeable) siltstones and mudstones.
		Dating of the artesian waters has given ages of almost 2 million years for the oldest waters, which occur in the south-western area of the Basin.
	www.nrw.qld.gov.au /water/gab (462 words)

	Water issues: drawing on the Great Artesian Basin :: ABC Western Queensland
		The Great Artesian Basin bore drain replacement scheme has capped many free flowing bores and the water is now piped to troughs for livestock.
		The GAB is one of the largest artesian groundwater basins in the world - underlying one-fifth of Australia and most of Queensland.
		John Seccombe is a grazier from Longreach and a former Chairman of the Great Artesian Basin Consultative Committee, he says it's an over-simplification to say there should be no new bores or that all bores should be metered.
	www.abc.net.au /westqld/stories/s1769496.htm?backyard (853 words)

	The Phylogeny of Prokaryotes Associated with Australia's Great Basin
		The Great Artesian Basin of Australia is the largest freshwater artesian basin in the world.
		The Great Artesian Basin of Australia has great economic and agricultural importance, but prokaryotic communities persisting in the bore waters influence its' quality.
		To further understand the prokaryotic ecology of the Great Artesian Basin, the development of real-time PCR to detect and quantify environmental isolates of Caloramator was undertaken.
	www4.gu.edu.au:8080 /adt-root/public/adt-QGU20030303.094942 (982 words)

	Articles / Impact / Wollemia nobilis: A Living Fossil and Evolutionary Enigma - Institute for Creation Research
		This shale belongs to the strata of the Great Artesian Basin, a vast sedimentary basin which covers 1.8 million square kilometers or about a quarter of the Australian continent (figure 1 inset) and which thus was once covered by water.
		The canyons in which the Wollemi pines are found were eroded into Triassic sandstones of the Sydney Basin, which was once a southeasterly extension of the Great Artesian Basin.
		However, the Sydney Basin was cut off from Great Artesian Basin by the Cretaceous, when earth movements began to uplift the Great Dividing Range (the continental divide along the western edge of the Sydney Basin) and the Blue Mountains Plateau (figure 1).
	www.icr.org /article/2707 (1575 words)

	Managing the Great Artesian Basin spring wetlands - EPA/QPWS
		Water from the GAB is used for stock watering, domestic water supply for rural properties and townships, feedlots, irrigation and mining operations.
		To preserve or maintain artesian pressure and to conserve the valuable GAB resource that is fundamental for many farming enterprises, free-flowing bores are being progressively capped and open drains replaced with pipes that reticulate the water to tanks and troughs.
		Due to the environmental and cultural significance of the GAB springs, it is unlikely that a permit would be issued for this purpose.
	www.epa.qld.gov.au /nature_conservation/habitats/wetlands/wetland_management_profiles/great_artesian_basin_spring_wetlands/managing_the_great_artesian_basin_spring_wetlands (3054 words)

	Spring wetlands of the Great Artesian Basin
		The Great Artesian Basin (GAB) is a vast aquifer comprised of porous sandstone spanning a huge portion of the continent.
		The water emanating from the Great Artesian Basin feeds spring wetlands that can be distinguished from other wetlands in dry landscapes because of their permanent water source.
		However, emerging demands on Great Artesian Basin groundwater, particularly from the mining sector and future groundwater allocations will have to be carefully controlled to avoid compromising the natural values of the springs.
	www.deh.gov.au /soe/2006/emerging/wetlands/index.html (827 words)

	Heathgate Resources :: The Great Artesian Basin (Site not responding. Last check: )
		Response: use of water drawn from the Great Artesian Basin is minimal in the context of pastoral bores in the area.
		There has been no connection between the GAB and the Beverley aquifer in the 40 million years since the uranium was deposited in the area.
		In the extremely unlikely event of a connection between the ore zone and the GAB, the higher water pressure in the GAB means the Beverley aquifer would be "contaminated" by the GAB as water flowed from it into the aquifer.
	www.heathgateresources.com.au /contentmine.jsp?xcid=124 (215 words)

	Great Artesian Basin Sustainability Initiative (Site not responding. Last check: )
		The basin lies largely beneath arid areas where groundwater is the only reliable source of water for human activity, as well as supporting important natural ecosystems including significant mound springs.
		The Great Artesian Basin Strategic Management Plan identified the control and efficient use of water are key issues for the recovery of artesian pressure and water savings.
		The Great Artesian Basin Sustainability Initiative (GABSI) is a joint project between the Federal and State Government, working with landholders to rehabilitate uncontrolled bores and replace bore drains with polyethylene pipes, tanks and troughs for livestock water and domestic supplies.
	www.dwlbc.sa.gov.au /water/projects/gabsi.html (380 words)

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