Fred T. Bowyer

Jul 31, 2024 | science.org | Kai Wang |Wenjia Li |Fred T. Bowyer |Rajkumar Vasudeva Raju

AbstractThe drivers of Ediacaran-Cambrian metazoan radiations remain unclear, as does the fidelity of the record. We use a global age framework [580–510 million years (Ma) ago] to estimate changes in marine sedimentary rock volume and area, reconstructed biodiversity (mean genus richness), and sampling intensity, integrated with carbonate carbon isotopes (δ13Ccarb) and global redox data [carbonate Uranium isotopes (δ238Ucarb)].

Aug 25, 2023 | science.org | Yun Zhu |Hideaki Yamamoto |David Elser |Fred T. Bowyer

Research ArticleGEOCHEMISTRY INTRODUCTIONThe end of the Sturtian cryochron [ca. 661 million years (Ma) ago ], during which global mean temperature increased from Snowball to super-greenhouse conditions, documents one of the most profound paleoclimatic shifts in Earth’s history (1). In the subsequent Cryogenian non-glacial interval (ca.