At ~ 4.0–2.5 billion years ago, seawater was saturated with Si and the silicified seafloor was rich in heavy Si (IMAGE)
Caption
At ~ 4.0–2.5 billion years ago, seawater was saturated with Si and the silicified seafloor was rich in heavy Si. The study found a change between 4.0—before heavy Si was incorporated into granitic magma—and 3.8 Ga—when it was incorporated for the first time.
Credit
Prof. LI Xianhua’s group
Usage Restrictions
News organizations may use or redistribute this image, with proper attribution, as part of news coverage of this paper only.
License
Original content