Jack Hills Conglomerate from Western Australia
By Alaska Science Center
August 2022 (approx.)
![Sample of Jack Hills Conglomerate from Western Australia. Oldest known zircon grains on Earth.](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/media/images/Conglomerate_2.jpg?itok=0H1iAUl1)
Detailed Description
This is the Jack Hills Conglomerate from Western Australia, which yielded the oldest known zircon grains on Earth at about 4.4 billion years old.
Sources/Usage
Public Domain.
U.S. Geological Survey