Young poorly crystalline graphite in the >3.8-Gyr-old Nuvvuagittuq banded iron formation
2011
Carbonaceous minerals in 3.8-billion-year-old rocks from West Greenland have been used as evidence for early life on Earth. Geochemical analyses of similar carbon minerals in 3.75- to 4.2-billion-year-old rocks from Canada show that they can be derived from subsequent alteration more than a billion years after the initial formation.
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