Lucy Webb
@lucywebb.bsky.social
PhD Candidate in Earth & Planetary Sciences at Stanford. I study sedimentary rocks and geochemistry to understand the evolution of life & environments on Earth.
Reposted by Lucy Webb
Bivalves usurped brachiopods as the dominant benthic filter-feeders—the reasons why have been debated. new #Geology paper by Kemi Ashing-Giwa and colleagues support the hypothesis that sulfide played a significant role in the extinction’s selectivity.
Read article: geosociety.co/Ashing-Giwa_et_al
Read article: geosociety.co/Ashing-Giwa_et_al
January 17, 2026 at 6:00 PM
Bivalves usurped brachiopods as the dominant benthic filter-feeders—the reasons why have been debated. new #Geology paper by Kemi Ashing-Giwa and colleagues support the hypothesis that sulfide played a significant role in the extinction’s selectivity.
Read article: geosociety.co/Ashing-Giwa_et_al
Read article: geosociety.co/Ashing-Giwa_et_al
Were Earth's deep oceans better oxygenated during the Tonian than later in the Neoproterozoic? New thallium isotope data suggest they were. Check out our new paper in Geology:
doi.org/10.1130/G536...
doi.org/10.1130/G536...
Thallium isotopic evidence for the Tonian rise and Cryogenian fall of Neoproterozoic oxygen levels | Geology | GeoScienceWorld
Estimating dissolved oxygen (O2) concentrations in seawater during the Neoproterozoic is central to testing hypotheses about the role of O2 in animal
doi.org
January 5, 2026 at 7:30 PM
Were Earth's deep oceans better oxygenated during the Tonian than later in the Neoproterozoic? New thallium isotope data suggest they were. Check out our new paper in Geology:
doi.org/10.1130/G536...
doi.org/10.1130/G536...