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The Great Artesian Basin (GAB) [1] of Australia is the largest and deepest artesian basin in the world, extending over 1,700,000 square kilometres (660,000 sq mi). Measured water temperatures range from 30 to 100 °C (86 to 212 °F). The basin provides the only source of fresh water through much of inland Australia. [2]
An artesian well is a well that brings groundwater to the surface without pumping because it is under pressure within a body of rock or sediment known as an aquifer. [1] When trapped water in an aquifer is surrounded by layers of impermeable rock or clay, which apply positive pressure to the water, it is known as an artesian aquifer . [ 1 ]
There are a few other sedimentary basins, the Great Artesian Basin can be broken into the Eromanga Basin in the west and the Surat Basin to the east. The Sydney Basin extends north into the Gunnedah Basin, which goes even further north into the Bowen Basin which extends into Queensland, under the Surat Basin. The New England Orogen has a few ...
A drainage basin is an extent of land where water from rain and melting snow or ice drains downhill into a body of water, such as a river, lake, reservoir, estuary, wetland, sea or ocean. The drainage basin includes both the streams and rivers that convey the water as well as the land surfaces from which water drains into those channels, and is ...
Elizabeth Springs is one of a suite of nationally important artesian springs in the Great Artesian Basin, which is the world's largest artesian basin. The artesian springs have been the primary natural source of permanent water in most of the Australian arid zone over the last 1.8 Million years (the Pleistocene and Holocene periods). These ...
The Great Artesian Basin situated in Australia is arguably the largest groundwater aquifer in the world (over 1.7 million km 2 or 0.66 million sq mi). [23] It plays a large part in water supplies for Queensland, and some remote parts of South Australia.
The Great Artesian Basin lies atop a layer of marine sandstone that formed the bottom of the inland Eromanga Sea. The Eromanga Sea was an inland sea across the Australian continent that formed in the Early Cretaceous. The sea extended from the Eromanga Basin northward to the Carpentarian Basin.
The Great Artesian Basin in central and eastern Australia is one of the largest confined aquifer systems in the world, extending for almost 2 million km 2. By analysing the trace elements in water sourced from deep underground, hydrogeologists have been able to determine that water extracted from these aquifers can be more than 1 million years old.