THE GIPPSLAND BASIN TOP LATROBE UNCONFORMITY, AND ITS EXPRESSION IN OTHER SE AUSTRALIA BASINS

Abstract

The Early/Middle Eocene was an important time for developing the present configuration of the Indo- Australian plate, with the onset of fast spreading beginning in the Southern Ocean, and the commencement of northwest directed compression in the Gippsland Basin. Significant unconformities developed during this time including the Top Latrobe Unconformity (Top Latrobe) within Gippsland, and similar unconformities in the Torquay and Otway Basins. On seismic over uplifted highs, (and where close spaced well data exists), a low angular unconformity exists between interbedded sand/shale/coal facies of the Latrobe Group and the Seaspray Group. The Marlin and Flounder channels erod..