Research Article

Cretaceous Vertical Motion of Australia and the AustralianAntarctic Discordance

Science  06 Mar 1998:
Vol. 279, Issue 5356, pp. 1499-1504
DOI: 10.1126/science.279.5356.1499

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A three-dimensional model of mantle convection in which the known history of plate tectonics is imposed predicts the anomalous Cretaceous vertical motion of Australia and the present-day distinctive geochemistry and geophysics of the Australian-Antarctic Discordance. The dynamic models infer that a subducted slab associated with the long-lived Gondwanaland-Pacific converging margin passed beneath Australia during the Cretaceous, partially stagnated in the mantle transition zone, and is presently being drawn up by the Southeast Indian Ridge.

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