ScienceDaily: Over billions of years, the total carbon content of the outer part of the Earth -- in its upper mantle, crust, oceans, and atmospheres -- has gradually increased, scientists reported this month in the journal Proceedings of the National Academy of Sciences.
Craig Manning, a professor of geology and geochemistry at UCLA, and Peter Kelemen, a geochemistry professor at Columbia University, present new analyses that represent an important advance in refining our understanding of Earth's deep carbon...