Acknowledgments
We thank Paul Lennox and Cam Quinn for discussions, and David Breeze for permission to produce figures from Breeze (2009). Seismic lines DPIHM07-02 and DPIHM07-04 were acquired by the Petroleum Geoscience Group of the Department of Trade and Investment in 2007. Interpretations are preliminary, and were carried out by Glen with the assistance of Mike Fahey and Ricky Mantaring. We thank Cheryl Hormann and Phillip Carter from the Geospatial group of the Geological Survey for their assistance in production of figures. Gary Colquhoun and Paul Parker produced the map images from the NSW GIS database. We thank Gideon Rosenbaum for his constructive review and Stephen Johnston for his comments. Glen publishes with permission of the acting Director of the Geological Survey of New South Wales.