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  • hydrothermal
  • 34CpDB, indicating that carbon was derived in approximately equal quantities from the dissolution of marine carbonate minerals and the oxidation of organic matter during migration of hydrothermal fluid through the underlying sediment column. (usgs.gov)
  • Siderite associated with waning hydrothermal activity has low δ 13 C values (−11.1 to −5.8‰), suggesting the incorporation of oxidized, organic carbon from the footwall sequence and/or the addition of magmatic carbon. (geoscienceworld.org)
  • surface
  • Both C-isotope anomalies are accompanied by biocalcification crises that may have been triggered by p CO 2 -induced changes in climate and in surface water chemistry. (geoscienceworld.org)
  • species
  • PDF) A new species of Lucinoma (Bivalvia: Lucinoidea) from the Oxygen Minimum Zone of the Oman Margin, Arabian Sea. (researchgate.net)
  • A new species of Lucinoma is described from the upper bathyal zone of the Oman margin, Arabian Sea, living in a low oxygen environment. (researchgate.net)
  • Distribution of newly described species from Discovery cruise 211 over the OMZ of the Oman Margin in relation to depth and dissolved oxygen concentrations. (researchgate.net)
  • stage
  • Carbon and oxygen analyses of enamel were performed on forty-six teeth of large mammals ( Equus germanicus , Mammuthus primigenius , Coelodonta antiquitatis , and Bison priscus ), coming from one doline in Boncourt (~ 80 ka, marine oxygen isotope stage MIS5a) and seven in Courtedoux (51-27 ka, late MIS3), in order to reconstruct the paleoclimatic and paleoenvironmental conditions of the region. (cambridge.org)