description Lawn Hill Overview
Lawn Hill is an eroded meteorite impact structure in northwestern Queensland, Australia, about 250 km north of Mount Isa. It appears at the surface as a ring of deformed Cambrian carbonate rocks around a central area of older Proterozoic sedimentary rocks, with an exposed diameter of roughly 18 to 20 km. The structure is also studied because the Century zinc-lead deposit lies near its margin and because the rocks preserve impact-related deformation and melt. [Macquarie University study](https://researchers.mq.edu.au/en/publications/new-insights-into-the-size-and-timing-of-the-lawn-hill-impact-str/).
help Lawn Hill FAQ
Where is the Lawn Hill impact structure?
Lawn Hill is in northwestern Queensland, Australia, about 250 kilometers north of Mount Isa. It is an eroded impact structure rather than a fresh crater with a preserved bowl.
What can be seen at the surface of Lawn Hill?
The surface shows a ring of deformed Cambrian carbonate rocks around a central area of older Proterozoic sedimentary rocks. Erosion has removed much of the original crater form.
Is Lawn Hill a visible round crater?
Not in the way a young, uneroded crater is visible. The impact is expressed mainly through the ring-shaped deformation and the contrast between the surrounding Cambrian rocks and older central rocks.
Why is Lawn Hill called an impact structure?
The circular arrangement of deformed rocks and the geological relationships between the central and surrounding units point to a past high-energy impact. Because the structure is eroded, its origin is reconstructed from geology rather than a preserved crater rim.
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