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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.
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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