Outlines of the geology of Tasmania

Tasmania, a small geological outlier of Eastern Australia, offers a highly interesting field to the geological student.
It must, however, be conceded that its physical history in pre-Cambrian and early Palaeozoic times can only be dimly guessed at. In later Palaeozoic times, the conditions appear to have been insular; in the Mesozoic, there was evidently a connection with the great Gondwana continent, which sank beneath the Indian Ocean prior to the Tertiary period.
The greater part of the island has since remained above sea- level.