Caucasian isn't a contemporary phenotype. Indigenous Australians...

Caucasian isn't a contemporary phenotype.

Indigenous Australians are generally regarded as 'Australids'. And further subdivided into 'North Australids', 'South Australids', 'Desert Australids', Tasmanids' and Barrineans' (the later two phenotypes now mostly extinct).

Each are genetically different (having had seperate evolutionary journeys over 10,000s of years) and look quite different too.