Yilgarn Craton

Basic geological regions of Australia, by age. The large brown region in the lower left of the continent constitutes the Yilgarn Craton.

The Yilgarn Craton is a large craton that constitutes a major part of the Western Australian land mass. It is bounded by a mixture of sedimentary basins and Proterozoic fold and thrust belts. Zircon grains in the Jack Hills, Narryer Terrane have been dated at ~4.27 Ga, with one detrital zircon dated as old as 4.4 Ga.[1]

The Murchison Province of the craton contains the Yarrabubba impact structure, at over 2 billion years old it is the oldest dated meteorite impact crater.[2]

  1. ^ Earlier known as Yilgarn Block Geological Survey of Western Australia (1975), The Geology of Western Australia, Western Australia Geological Survey, ISBN 978-0-7244-6084-7, section Yilgarn Block by I. R. Williams page 33–81.
  2. ^ Erickson, Timmons M.; Kirkland, Christopher L.; Timms, Nicholas E.; Cavosie, Aaron J.; Davison, Thomas M. (21 January 2020). "Precise radiometric age establishes Yarrabubba, Western Australia, as Earth's oldest recognised meteorite impact structure". Nature Communications. 11 (1): 300. Bibcode:2020NatCo..11..300E. doi:10.1038/s41467-019-13985-7. PMC 6974607. PMID 31964860.

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