Wilkes Land crater

[2] Evidence cited included a large negative gravity anomaly coincident with a subglacial topographic depression 243 kilometres (151 mi) across and having a minimum depth of 848 metres (2,782 ft).

[5][6] The Wilkes Land mass concentration (or mascon) is centered at 70°S 120°E / 70°S 120°E / -70; 120 and was first reported at a conference in May 2006 by a team of researchers led by Ralph von Frese and Laramie Potts of Ohio State University.

Due to the site's location beneath the Antarctic ice sheet, there are no direct samples to test for evidence of impact.

There are alternative explanations for this mass concentration, such as formation by a mantle plume or other large-scale volcanic activity, but a variety of research methods lend support to the impact hypothesis.

[11][12] Nonetheless, according to Frese, recent studies in 2018 seem to sustain the impact origin of the crater, and the event may be linked to the separation of Eastern Antarctica from southern Australia.