Search Results - "Young, Seth A"

Pulse of atmospheric oxygen during the late Cambrian by Saltzman, Matthew R., Young, Seth A., Kump, Lee R., Gill, Benjamin C., Lyons, Timothy W., Runnegar, Bruce, Berner, Robert A.

“…A rise in atmospheric O₂ has been linked to the Cambrian explosion of life. For the plankton and animal radiation that began some 40 million yr later and…”
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Microbial life at −13 °C in the brine of an ice-sealed Antarctic lake by Murray, Alison E, Kenig, Fabien, Fritsen, Christian H, McKay, Christopher P, Cawley, Kaelin M, Edwards, Ross, Kuhn, Emanuele, McKnight, Diane M, Ostrom, Nathaniel E, Peng, Vivian, Ponce, Adrian, Priscu, John C, Samarkin, Vladimir, Townsend, Ashley T, Wagh, Protima, Young, Seth A, Yung, Pung To, Doran, Peter T

“…The permanent ice cover of Lake Vida (Antarctica) encapsulates an extreme cryogenic brine ecosystem (−13 °C; salinity, 200). This aphotic ecosystem is anoxic…”
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Geochemical Records Reveal Protracted and Differential Marine Redox Change Associated With Late Ordovician Climate and Mass Extinctions by Kozik, Nevin P., Gill, Benjamin C., Owens, Jeremy D., Lyons, Timothy W., Young, Seth A.

“…The Ordovician (Hirnantian; 445 Ma) hosts the second most severe mass extinction in Earth history, coinciding with Gondwanan glaciation and increased…”
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Expansion of Reducing Marine Environments During the Ireviken Biogeochemical Event: Evidence From the Altajme Core, Gotland, Sweden by Stolfus, Brittany M., Allman, Lindsi J., Young, Seth A., Calner, Mikael, Hartke, Emma R., Oborny, Stephan C., Bancroft, Alyssa M., Cramer, Bradley D.

“…New δ34Spy (pyrite) and δ34SCAS (carbonate‐associated sulfate) across the Llandovery‐Wenlock boundary (∼432 Ma) provide evidence for the expansion of reduced…”
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Trans-Atlantic application of the Baltic Middle and Upper Ordovician carbon isotope zonation by Bergström, S M, Saltzman, M R, Leslie, S A, Ferretti, A, Young, S A

“…Application of the recently introduced Baltic δ^sup 13^C isotope zonation to a composite North American Darriwilian through Hirnantian succession shows that in…”
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Oxygenation of the Baltoscandian shelf linked to Ordovician biodiversification by Lindskog, Anders, Young, Seth A., Bowman, Chelsie N., Kozik, Nevin P., Newby, Sean M., Pettersson, Johan, Molin, Emmy, Owens, Jeremy D.

“…Marine biodiversity increased markedly during the Ordovician Period (~487–443 million years ago). Some intervals within the Ordovician were associated with…”
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Protracted oxygenation across the Cambrian–Ordovician transition: A key initiator of the Great Ordovician Biodiversification Event? by Kozik, Nevin P., Young, Seth A., Lindskog, Anders, Ahlberg, Per, Ahlberg, Per

“…Fluctuations in marine oxygen concentrations have been invoked as a primary driver for changes in biodiversity throughout Earth history. Expansions in reducing…”
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Constraining reducing conditions in the Prague Basin during the late Silurian Lau/Kozlowskii extinction event by Allman, Lindsi J., Bowman, Chelsie N., Frýda, Jiří, Kozik, Nevin P., Owens, Jeremy D., Young, Seth A.

“…The Silurian was marked by repeated extinctions, carbon cycle volatility, and significant intervals of climatic change. The most notable of these events were…”
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Middle–Late Ordovician (Darriwilian–Sandbian) decoupling of global sulfur and carbon cycles: Isotopic evidence from eastern and southern Laurentia by Young, Seth A., Gill, Benjamin C., Edwards, Cole T., Saltzman, Matthew R., Leslie, Stephen A.

“…Middle–Late Ordovician sequences from the Appalachian Basin and Arbuckle Mountain regions of North America were analyzed for carbonate-associated sulfate…”
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Constraining oceanic oxygenation during the Shuram excursion in South China using thallium isotopes by Fan, Haifeng, Nielsen, Sune G., Owens, Jeremy D., Auro, Maureen, Shu, Yunchao, Hardisty, Dalton S., Horner, Tristan J., Bowman, Chelsie N., Young, Seth A., Wen, Hanjie

“…Ediacaran sediments record an unusual global carbon cycle perturbation that has been linked to widespread oceanic oxygenation, the Shuram negative C isotope…”
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Reactions of hydrothermal solutions with organic matter in Paleoproterozoic black shales at Talvivaara, Finland: Evidence from multiple sulfur isotopes by Young, Seth A., Loukola-Ruskeeniemi, Kirsti, Pratt, Lisa M.

“…Stable isotopic studies of Archean–Paleoproterozoic sedimentary rocks older than 2.4Ga have documented large mass-anomalous fractionations of sulfur isotopes…”
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Did changes in atmospheric CO2 coincide with latest Ordovician glacial–interglacial cycles? by Young, Seth A., Saltzman, Matthew R., Ausich, William I., Desrochers, André, Kaljo, Dimitri

“…The Late Ordovician Hirnantian Stage (44million years ago) was one of three time periods during the past half billion years in which large continental glaciers…”
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Geochemical evidence for widespread euxinia in the Later Cambrian ocean by Gill, Benjamin C., Lyons, Timothy W., Young, Seth A., Kump, Lee R., Knoll, Andrew H., Saltzman, Matthew R.

“…Oxygen shortage in the ancient oceans It has been suggested that the Cambrian ocean was oxygen deficient, but physical evidence for widespread anoxia has been…”
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Rapid marine oxygen variability: Driver of the Late Ordovician mass extinction by Kozik, Nevin P., Young, Seth A., Newby, Sean M., Liu, Mu, Chen, Daizhao, Hammarlund, Emma U., Bond, David P. G., Them, Theodore R., Owens, Jeremy D.

“…The timing and connections between global cooling, marine redox conditions, and biotic turnover are underconstrained for the Late Ordovician. The second most…”
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Strontium and carbon isotope stratigraphy of the Llandovery (Early Silurian): Implications for tectonics and weathering by Gouldey, Jeremy C., Saltzman, Matthew R., Young, Seth A., Kaljo, Dimitri

“…A high-resolution 87Sr/ 86Sr curve and paired δ 13C carbonate-organic data set is generated for the Llandovery Series from the Ikla drill core in Estonia. A δ…”
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Iron cycling in the anoxic cryo-ecosystem of Antarctic Lake Vida by Proemse, Bernadette C., Murray, Alison E., Schallenberg, Christina, McKiernan, Breege, Glazer, Brian T., Young, Seth A., Ostrom, Nathaniel E., Bowie, Andrew R., Wieser, Michael E., Kenig, Fabien, Doran, Peter T., Edwards, Ross

“…Iron redox cycling in metal-rich, hypersaline, anoxic brines plays a central role in the biogeochemical evolution of life on Earth, and similar brines with the…”
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Geochemical evidence for expansion of marine euxinia during an early Silurian (Llandovery–Wenlock boundary) mass extinction by Young, Seth A., Kleinberg, Andrew, Owens, Jeremy D.

“…•First multiproxy paleoredox data set spanning the early Silurian Ireviken event.•Parallel excursions of sulfur and carbon isotopes from carbonates in…”
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Coupled biostratigraphy and chemostratigraphy at Lanna, Sweden: A key section for the Floian–lower Darriwilian interval (Lower–Middle Ordovician) by Lindskog, Anders, Young, Seth A., Nielsen, Arne T., Eriksson, Mats E.

“…The Lanna area in the province of Närke, south-central Sweden, hosts a succession of cool-water carbonate strata that are largely devoid of tectonic and…”
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Progressive marine oxygenation and climatic cooling at the height of the Great Ordovician Biodiversification Event by Kozik, Nevin P., Young, Seth A., Ahlberg, Per, Lindskog, Anders, Owens, Jeremy D.

“…The oxygen content of ancient seawater has been hypothesized to be a major controlling factor for biodiversity throughout Earth's history. The Great Ordovician…”
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Uranium and molybdenum isotope evidence for globally extensive marine euxinia on continental margins and in epicontinental seas during the Devonian-Carboniferous Hangenberg Crisis by Yang, Shuai, Lu, Xinze, Chen, Xinming, Zheng, Wang, Owens, Jeremy D., Young, Seth A., Kendall, Brian

“…The end-Devonian Hangenberg Crisis was one of the biggest Phanerozoic mass extinctions. However, the mechanism(s) that triggered this event is still debated…”
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