The history of Aboriginal Australians is thought to have spanned 30,000 to 45,000 years, although some estimates have put the figure at up to 60,000 years before European settlement.
However, there are considerable technical difficulties and uncertainties in dating rock art which make it difficult to determine the age of Australia's earliest rock art.
The couple should be eligible to marry according to local rules defining ‘ideal preferences and accepted authorities’.2.
Appropriate betrothal arrangements should have been made between the two kin groups concerned. Actual marriage may be distinguished from the betrothal when the parties cohabit publicly and take on ‘marital responsibilities including sexual relations’.4.
In northern Australia there are numerous sandstone rock-shelters.
Many of these have been used for camping and their floors are layered with charcoal and ash from camp fires, the remains of food such as shells and animal bones, stone tools and, very often, pieces of ochre.