Thursday, August 5, 2021
Earth Oldest Dirt: UO geologist Greg Retallack has dirt on his hands

Earth Oldest Dirt: UO geologist Greg Retallack has dirt on his hands

UO geologist Greg Retallack has dirt on his hands—and at 3.7 billion years old, it might be some of the oldest dirt on Earth. Found in a metamorphic rock formation in southwestern Greenland, the soil in...

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