5. When the oceans dropped, the area covered by the inland sea became layers of sandstone and rock. The water in The Great Artesian Basin is often salty. Why might this be?
6. Scientists believe that water from rain and rivers soak through the rock slowly and is gathered in an aquifer where it stays until it is taken out through a bore or natural spring.
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10. Not all scientists agree about whether the Artesian Basin is a renewable resource. That means the water will be replaced naturally as we take it out. This is called recharging The arrows on this map show that some scientists believe that the rivers and water catchments on the edge of the Great Artesian Basin will flow into it.