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Cambrian explosion condensed: High-precision geochronology of the lower Wood Canyon Formation, Nevada

https://doi.org/10.1073/pnas.2301478120

Nelson, Lyle L.; Crowley, James L.; Smith, Emily F.; Schwartz, Darin M.; Hodgin, Eben B.; Schmitz, Mark D. (July 2023, Proceedings of the National Academy of Sciences)

The geologically rapid appearance of fossils of modern animal phyla within Cambrian strata is a defining characteristic of the history of life on Earth. However, temporal calibration of the base of the Cambrian Period remains uncertain within millions of years, which has resulted in mounting challenges to the concept of a discrete Cambrian explosion. We present precise zircon U–Pb dates for the lower Wood Canyon Formation, Nevada. These data demonstrate the base of the Cambrian Period, as defined by both ichnofossil biostratigraphy and carbon isotope chemostratigraphy, was younger than 533 Mya, at least 6 My later than currently recognized. This new geochronology condenses previous age models for the Nemakit–Daldynian (early Cambrian) and, integrated with global records, demonstrates an explosive tempo to the early radiation of modern animal phyla.
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Identification of Erosional Terraces on Seamounts: Implications for Interisland Connectivity and Subsidence in the Galápagos Archipelago

https://doi.org/10.3389/feart.2018.00088

Schwartz, Darin M.; Soule, S. Adam; Wanless, V. Dorsey; Jones, Meghan R. (July 2018, Frontiers in Earth Science)

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Petrogenesis of alkalic seamounts on the Galápagos Platform

https://doi.org/10.1016/j.dsr2.2017.09.019

Schwartz, Darin M.; Wanless, V. Dorsey; Berg, Rebecca; Jones, Meghan; Fornari, Daniel J.; Soule, S. Adam; Lytle, Marion L.; Carey, Steve (April 2018, Deep Sea Research Part II: Topical Studies in Oceanography)

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Submarine Deep-Water Lava Flows at the Base of the Western Galápagos Platform

https://doi.org/10.1029/2018GC007632

Anderson, Molly; Wanless, V. Dorsey; Schwartz, Darin M.; McCully, Emma; Fornari, Daniel J.; Jones, Meghan R.; Soule, S. Adam (October 2018, Geochemistry, Geophysics, Geosystems)