For years, researchers looking at seafloor sediments would find bits of black carbon along with organic carbon strewn across the ocean floor, but they couldn’t say exactly where it originated. The challenge with studying deep marine carbon is that it is a mixture of fresh material delivered from the surface and an aged component, the origin of which had been previously unknown.
Click here for original story, Study finds direct links between old carbon, graphite and seafloor hydrothermal vents
Source: Phys.org