All Articles tagged paleoredox

• Science Paper
  May 01, 2018 EDT
  The Iron Paleoredox Proxies: A Guide to the Pitfalls, Problems and Proper Practice
  Rob RaiswellDalton S. HardistyTimothy W. LyonsDonald E. CanfieldJeremy D. OwensNoah J. PlanavskySimon W. PoultonChristopher T. Reinhard

  Oceanic anoxia—including euxinic settings defined by the presence of water column hydrogen sulfide (H2S)—is minor in the ocean today. Such conditions, however, were common or even dominant in the past,...

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• Science Paper
  May 01, 2018 EDT
  An Evaluation of Sedimentary Molybdenum and Iron as Proxies for Pore Fluid Paleoredox Conditions
  Dalton S. HardistyTimothy W. LyonsNatascha RiedingerTerry T. IssonJeremy D. OwensRobert C. AllerDanny M. RyeNoah J. PlanavskyChristopher T. ReinhardBen C. GillAndrew L. MastersonDan AsaelDavid T. Johnston

  Iron speciation and trace metal proxies are commonly applied together in efforts to identify anoxic settings marked by the presence of free sulfide (euxinia) or dissolved iron (ferruginous) in the...

  Abstract
• Science Paper
  October 01, 2016 EDT
  A Holocene History of Dynamic Water Column Redox Conditions in the Landsort Deep, Baltic Sea
  Dalton S. HardistyNatascha RiedingerNoah J. PlanavskyDan AsaelThomas AndrénBo B. JørgensenTimothy W. Lyons

  The modern Baltic Sea is the world9s largest anthropogenically forced anoxic basin. Using integrated geochemical records collected during Integrated Ocean Drilling Program (IODP) Expedition 347 from the deepest and one...

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• Science Paper
  May 01, 2013 EDT
  Paleoredox and Pyritization of Soft-Bodied Fossils in the Ordovician Frankfort Shale of New York
  Úna C. FarrellDerek E. G. BriggsEmma U. HammarlundErik A. SperlingRobert R. Gaines

  Multiple beds in the Frankfort Shale (Upper Ordovician, New York State), including the original “Beecher9s Trilobite Bed,” yield fossils with pyritized soft-tissues. A bed-by-bed geochemical and sedimentological analysis was carried...

  Abstract