Diamantina River ring feature

[1][5] The region in which the asteroid impact theoretically happened lies in a sparsely populated area in the Australian Outback centred roughly at 22°09′S 141°54′E / 22.15°S 141.9°E / -22.15; 141.9.

The depopulated town of Middleton and Dagworth Station – famous for the part it played in the creation of "Waltzing Matilda" – lie within the anomaly discovered here.

To Andrew Glikson, whose research interests include "early crustal evolution with focus on the role of asteroid impacts",[7] the near-circular course was the first indication that there might be an anomaly in the crust in this region.

This told the researchers about differences in rock densities as compared to neighbouring areas of crust, likewise suggesting that there could long ago have been a major impact event.

[5] Proof is the one thing currently wanting in any quest to label the Diamantina River ring feature an asteroid impact structure.

[5] Analysis of the core samples would involve, among other things, the detection of "shock textures" in the rock, caused by the great energy of an asteroid impact.

Richard Blewett, mentioned above, admits that there are other possible explanations for the geological anomaly on the upper Diamantina, but adds "but they become difficult to explain".