No evidence for high atmospheric oxygen levels 1,400 million years ago
Zhang et al. (1) recently proposed atmospheric oxygen levels of ∼4% present atmospheric levels (PAL) based on modeling a paleoenvironment reconstructed from trace metal and biomarker data from the 1,400 Ma Xiamaling Formation in China. Intriguingly, this pO2 level is above the threshold oxygen requi...
Main Authors: | , , , , , , , , |
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Other Authors: | |
Format: | Article |
Language: | en_US |
Published: |
National Academy of Sciences (U.S.)
2017
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Online Access: | http://hdl.handle.net/1721.1/109928 https://orcid.org/0000-0002-7380-3707 |