Ontology highlight
ABSTRACT:
SUBMITTER: Dahl TW
PROVIDER: S-EPMC6765300 | biostudies-literature | 2019 Sep
REPOSITORIES: biostudies-literature
Proceedings of the National Academy of Sciences of the United States of America 20190909 39
The proliferation of large, motile animals 540 to 520 Ma has been linked to both rising and declining O<sub>2</sub> levels on Earth. To explore this conundrum, we reconstruct the global extent of seafloor oxygenation at approximately submillion-year resolution based on uranium isotope compositions of 187 marine carbonates samples from China, Siberia, and Morocco, and simulate O<sub>2</sub> levels in the atmosphere and surface oceans using a mass balance model constrained by carbon, sulfur, and s ...[more]