Lawn Hill ‘crater’ refers to an Ordovician impact structure, the eroded remnant of a former impact crater, situated approximately 220 km north-north-west of Mount Isa in northwestern Queensland, Australia.

The origin of this circular feature was uncertain until the discovery of shatter cones and shocked quartz from uplifted rocks at the centre was reported in 1987.

[1][2] The site is eroded and it has been suggested that the original crater was slightly larger, at around 20 km diameter.

510 Ma) based on comparisons with nearby outcrops of marine limestone in the Georgina Basin, were simply deposited in the crater after its formation, or were actually deformed by the impact event.

[6] The Georgina Basin was still an active depocenter at that time and the excellent preservation of the structure is attributed to burial by post-impact sedimentation.