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Showing 1 to 6 of 6 for “"Cenomanian-Turonian boundary."”.
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High-precision U/Pb dating of the Cenomanian-Turonian boundary Kaiparowits Plateau, Utah
The massive marine species turnover at the Cenomanian-Turonian boundary is associated with Oceanic Anoxic Event 11 (OAE II) and is often identified by an increase of a13C in the carbon isotopic record. A high-precision chronology of the Cenomanian- Turonian boundary is needed to better constrain …
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High-Precision ID-TIMS U-Pb Zircon Geochronology of Three Cenomanian Bentonites from the Western Canada Foreland Basin
… extensive bentonites have been 1 mapped in Cenomanian strata and traced into the U.S. portion of the basin where relationships to globally correlated ammonite zones can be determined. The X, A-X and Bighorn River bentonites provide important calibration points for the Cenomanian Stage. …
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Foraminiferal and stable isotope investigation of the Cenomanian-Turonian extinction and oceanic anoxic event
… global change, particularly around the Cenomanian-Turonian Boundary (CTB) (93.5 Ma). The mid-Cretaceous is considered to mark a period of intense global warming related to widespread tectonic activity, leading to periods of high sea level and no polar ice. This had great effects on the …
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Developing iodine proxies for oceanic oxygenation conditions during greenhouse episodes
… ocean basins through the Cretaceous OAE 2 at the Cenomanian-Turonian boundary (94 Ma). The iodine proxy records are interpreted in the context of a wide range of other geochemical data and Earth system biogeochemical model simulations. </p> <p>Iodate and iodide are the most thermodynamically …
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POPULATION DYNAMICS AND GEOCHEMISTRY OF BENTHIC AND PLANKTONIC FORAMINIFERA TO INTERPRET THE PALEOCEANOGRAPHIC CHANGES ACROSS THE CENOMANIAN-TURONIAN OCEANIC ANOXIC EVENT 2 AT LOW AND HIGH LATITUDES
… throughout the Earth’s history, namely the Cenomanian-Turonian Oceanic Anoxic Event 2 (OAE 2). It is globally marked by a positive δ13C excursion due to the deposition and burial of large amounts of organic matter in the ocean. The exact causes of OAE 2 are still studied but it is understood …
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Controls on the accumulation of organic matter in the Eagle Ford Group, Central Texas, USA.
The Upper Cretaceous Eagle Ford Formation is an organic rich marine mudrock which outcrops across central Texas. This study documents the chemostratigraphic character of the Pepper and Eagle Ford Formations in central Texas using major and trace elements, organic matter abundance, and the isotopic …