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Scientist gets the dirt on what could be the planet's oldest soil

Source
Phys.org

Publication Date
2018-11-08

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 question was exposed beneath a retreating ice cap and spotted during a helicopter survey by study co-author Nora Noffke. A sedimentologist at Old Dominion University, Noffke noticed certain soil-like characteristics in the exposed rock, including mudcracks and sand crystals.

Content
https://phys.org/news/2018-11-scientist-dirt-planet-oldest-soil.html