File:4,030,000,000 Years Acasta Gneiss.jpg

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current08:10, 6 February 2013Thumbnail for version as of 08:10, 6 February 20131,797 × 1,485 (342 KB)commons>Geo Swan{{Information |Description=Deep time. Oldest rock. A fist-sized sample from the Acasta River, an obscure little drainage up near Great Bear Lake, Northwest Territories, Canada. This was collected from what is the oldest known rock formation on the plan...

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