On line dating in australia
Various Aboriginal groups seem to have preserved oral histories of the Flandrian sea level rise, in the Kimberley and Northern Australia and also in the isolation of Rottnest Island from the southwestern Western Australian coast 12,000 years ago.
The finding of a chert deposit in the strait between the island and the mainland, and the use of chert as a predominate rock in the lithic industries of the region, enables the date to be fairly well established.
From that time on, the Tasmanian Aborigines were geographically isolated.
By 9,000 years ago small islands in Bass Strait, as well as Kangaroo Island were no longer inhabited.
The period from 18,000 to 15,000 years ago saw increased aridity of the continent with lower temperatures and less rainfall than currently prevails.
Between 16,000 and 14,000 years BP the rate of sea level rise was most rapid rising about 50 feet in 300 years according to Peter D. At the end of the Pleistocene, roughly 13,000 years ago, the Torres Strait connection, the Bassian Plain between modern-day Victoria and Tasmania, and the link from Kangaroo Island began disappearing under the rising sea.
Given that the likely landfall regions have been under around 50 metres of water for the last 15,000 years, it is unlikely that the timing will ever be established with certainty.
Palynological evidence from South Eastern Australia suggests an increase in fire activity dating from around 120,000 years ago.
This has been interpreted as representing human activity, but the dating of the evidence has been strongly challenged.
Repeated episodes of extended glaciation during the Pleistocene epoch resulted in decreases of sea levels by more than 100 metres in Australasia.
People appear to have arrived by sea during a period of glaciation, when New Guinea and Tasmania were joined to the continent of Australia.