Highly fractionated chromium isotopes in Mesoproterozoic-aged shales and atmospheric oxygen
There is a long standing debate whether low atmospheric oxygen levels during the Mesoproterozoic Era hindered the evolution of crown-group animals. Here, the authors show with shale-hosted chromium isotopes that sufficient atmospheric oxygen for crown-group animals likely predated their evolution by...
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Autores principales: | Donald E. Canfield, Shuichang Zhang, Anja B. Frank, Xiaomei Wang, Huajian Wang, Jin Su, Yuntao Ye, Robert Frei |
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Formato: | article |
Lenguaje: | EN |
Publicado: |
Nature Portfolio
2018
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Materias: | |
Acceso en línea: | https://doaj.org/article/84862de8b71d49fdbaf7ce18c3acd1ca |
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