Until 1813 when Gregory Blaxland, William Lawson, and William Wentworth pas
Until 1813 when Gregory Blaxland, William Lawson, and William Wentworth passed over it, it was a major barrier against westward colonization.  It is not in fact a single unit as it includes many chains, including the Carnarvon Range, the Blue Mountains, and the Snowy Mountains.  Containing the headwaters of rivers such as the Darling, it splits the watershed between the Murray-Darling Basin and the Pacific Ocean.  Stretching from Cape York Peninsula in Queensland to Victoria in the south, FTP, what is this mountain range in the eastern part of Australia?
Until 1813 when Gregory Blaxland, William Lawson, and William Wentworth passed over it, it was a major barrier against westward colonization.  
Great Dividing Range