description Gnargoo Overview
Gnargoo is a possible buried impact structure on the Gascoyne Platform in the Southern Carnarvon Basin of Western Australia. It lies beneath about 500 meters of Cretaceous and younger sediments and is identified from seismic-reflection, gravity, and structural evidence. The proposed structure is about 75 kilometers across, with a buried dome and central uplift, and the event is constrained between deformed Lower Permian rocks and undeformed Lower Cretaceous strata.
help Gnargoo FAQ
What is the Gnargoo structure?
Gnargoo is a possible buried impact structure on the Gascoyne Platform in Western Australia's Southern Carnarvon Basin. Its impact origin remains proposed rather than firmly established.
How deep is the Gnargoo structure?
It lies beneath about 500 meters of Cretaceous and younger sediments. That cover prevents direct observation of the suspected crater.
What evidence suggests that Gnargoo may be an impact crater?
The proposal is based on seismic-reflection data, gravity measurements, and structural evidence. These methods reveal buried shapes and density or deformation patterns without exposing the rocks.
Can Gnargoo be seen at the surface?
No obvious surface crater is described because younger sediments bury the structure. Its possible impact origin is studied through geophysical surveys and underground structural interpretation.
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