Ontology highlight
ABSTRACT:
SUBMITTER: Lau KV
PROVIDER: S-EPMC4780601 | biostudies-literature | 2016 Mar
REPOSITORIES: biostudies-literature
Lau Kimberly V KV Maher Kate K Altiner Demir D Kelley Brian M BM Kump Lee R LR Lehrmann Daniel J DJ Silva-Tamayo Juan Carlos JC Weaver Karrie L KL Yu Meiyi M Payne Jonathan L JL
Proceedings of the National Academy of Sciences of the United States of America 20160216 9
Delayed Earth system recovery following the end-Permian mass extinction is often attributed to severe ocean anoxia. However, the extent and duration of Early Triassic anoxia remains poorly constrained. Here we use paired records of uranium concentrations ([U]) and (238)U/(235)U isotopic compositions (δ(238)U) of Upper Permian-Upper Triassic marine limestones from China and Turkey to quantify variations in global seafloor redox conditions. We observe abrupt decreases in [U] and δ(238)U across the ...[more]