Lying in the southwest corner of the Great Artesian Basin,  it is believed that it was fresh until about 30,000 years ago,  when a downfaulting resulted in the drainage to the sea being  blocked.
Lying in the southwest corner of the Great Artesian Basin,  it is believed that it was fresh until about 30,000 years ago,  when a downfaulting resulted in the drainage to the sea being  blocked. Fed by rivers such as the Diamantina and Georgina, it  only fills completely once or twice a century, so its size varies  widely, up to a maximum of 3,700 square miles. FTP, name this  lake, whose dry bed, at 50 feet below sea level, is the lowest  point in Australia.
Lying in the southwest corner of the Great Artesian Basin,  it is believed that it was fresh until about 30,000 years ago,  when a downfaulting resulted in the drainage to the sea being  blocked.
Lake {Eyre}