Jack Hills

They are best known as the source of the oldest material of terrestrial origin found to date: Hadean zircons that formed around 4.404 billion years ago.

The Jack Hills are located in the Narryer Gneiss terrane of the Yilgarn Craton, Western Australia, and comprise an 80 kilometres (50 mi) long northeast-trending belt of folded and metamorphosed supracrustal rocks.

The protolith age of the Narryer Gneiss terrane is variable, but generally considered to be in excess of 3.6 Ga (billion years).

[9] Due to its importance as a geology research site, part of the Jack Hills is included on the Australian National Heritage List.

[11] In respect of being the 'largest in situ repository of the oldest terrestrial crystals known to exist on Earth', the International Union of Geological Sciences (IUGS) included the 'Archean zircons of Erawondoo Hill' in its assemblage of 100 'geological heritage sites' around the world in a listing published in October 2022.