Publication Name: The Sedimentary Basins of WA
Authors: Robert S. Nicoll and Clinton B. Foster
Publication Volumne: 2
Date Published: December 1998
Number of Pages: 22
Reference Type: Book Section
Abstract:Studies of the relationships between conodont faunas and spore-pollen and dinocyst palynofloras from the subsurface of basins of the Western Australian margin have revised the hard links between Australian palynomorph zones and the classic stage terminology for the Triassic. In North America and Europe, conodont zones have been linked with the type sections of the global Triassic stages. The re-evaluation of older conodont collections combined with the recovery of new conodont faunas in Western Australia and their associated palynomorph zones, now allow a better tie between the locally defined palynomorph zones and the type Triassic Stages. These revisions enhance the interpretation of time-depth and space relationships, as they apply to Triassic sediments on the North West Shelf, the Western Margin Basins (Perth and Southern Carnarvon) and the Indonesian island of Timor. The Wombat-Timor Trough (newly defined) is recognised as the axis of sedimentation on the North West Shelf in the Triassic Period.