45S 130E: Australia-Antarctic Ridge

Steven Dutch, Professor Emeritus, Natural and Applied Sciences, Universityof Wisconsin - Green Bay

Scale: 1 pixel = 10 km. 10-degree grid;             Lambert Conformal Conic Projection, Center 45S 130E

       Global Geology Index



Ocean Floor Ages

Tectonic Structures


Land Geology

Notes and References


This map shows the Australia-Antarctic Ridge. Australia moved almost due north from Antarctica.

New Zealand's story is far more complex. New Zealand would be a respectable continent if it were above sea level. The Lord Howe Rise, the submerged northern extension of New Zealand, doesn't fit the east coast of Australia at all. It is no doubt a mosaic of small plates that shifted as New Zealand and Australia split apart.  New Zealand is split by the Alpine Fault, a transform fault between the Australian and Pacific Plates. The block southeast of the Alpine Fault, consisting of most of the South Island (Middle Earth) and the submerged Chatham Rise, can only be fit to Antarctica by rotating 90 degrees.

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Created 11 April 2014, Last Update 19 January 2020