http://australianmuseum.net.au/the-spread-of-people-to-australia
Kow Swamp
This ancient burial site in northern Victoria was excavated between 1968 and 1972. The human skeletons discovered here were extremely significant because they were accurately dated between 9500 to 14,000 years ago and demonstrated substantial differences between ancient and more recent Aboriginal people.
The remains of over forty individuals have been found at Kow Swamp and include those of men, women and children. This burial site is one of the largest from this time period anywhere in the world. Many of the skeletons have a greater skeletal mass, more robust jaw structures and larger areas of muscle attachment than in contemporary Aboriginal men. The female skeletons from this region also show similar differences when compared with modern Aboriginal women.
The Spread Of People To Australia
Archaeological evidence shows that modern humans had reached South-east Asia by 70,000 years ago.
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The ‘Multiregional’ Model
Some scientists interpret the variation found in the fossil record of early Indigenous Australians as evidence that Australia was colonised by two separate genetic lineages of modern humans. One lineage was believed to have been the evolutionary descendants of Indonesian Homo erectus while the other lineage had evolved from Chinese Homo erectus. Modern Aboriginal people are the result of the assimilation of these two genetic lineages.
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I first became interested in the Kow Marsh people after attending the David Koch evolution exhibit at the Smithsonian in DC. there is a wall of skulls from about 6 million years ago to recent times tending to show the evolution from early hominids to modern homo sapiens. There are many skulls on this wall. One of the last in the lower right hand corner was labeled homo sapien from Kow Marsh. I looked at it carefully and said to myself, no way this is homo sapien. I then compared it with the several Neanderthal skulls exhibited. No, it didn’t look like Neanderthal either, although more like them than modern man. Then I compared with Heidelbergensis, and decided that it looked quite similar to them. I came home and Googled Kow Marsh and found the interesting story that these remains were only about 10 to 12,000 years old, therefore MUST be homo sapiens. So now we find very old rock painting in the far north where new homonids would first land in Australia and gradually move south. Then we find primitive remains that are only 12,000 years old in the far south. Logical conclusion, this may have been a remnant population that was finally killed off by the more recent Aboriginal people. Just like the Clovis first scientists, apparently, the folks in Australia also are lacking in imagination as well as respect for our ancient ancestors. Here are images of old skulls, the early ones being Kow Swamp. For more articles use Kow Swamp, not Kow Marsh.
Here is the Smithsonian “mis”identifying? the skull as homo sapiens: http://humanorigins.si.edu/evidence/human-fossils/fossils/kow-swamp