1. Department of Geological Sciences University of Missouri Columbia MO 65211 USA
2. X‐ray Microanalysis Core Facility University of Missouri Columbia MO 65211 USA
3. Department of Biological Sciences Macquarie University Sydney NSW 2109 Australia
4. State Key Laboratory of Continental Dynamics Shaanxi Key Laboratory of Early Life & Environments Department of Geology Northwest University Xi’an 710069 China