Jabarkan Geologi dari Australia (buana) dalam bahasa sunda

The continent primarily sits on the Indo-Australian Plate.  The lands were joined with Antarctica as part of the southern supercontinent Gondwana until the plate began to drift north about 96 million yéars ago (mya). For most of the time since then, Australia-New Guinéa has remained a single, continuous landmass.

When the last ice age ended about 10,000 yéars ago, rising séa levels formed Bass Strait, separating Tasmania from the mainland. Then about 8,000 to 6,500 yéars ago, the lowlands in the north were flooded by the séa, separating New Guinéa and Australia.