Zobrazeno 1 - 10
of 111
pro vyhledávání: '"Bradley B. Sageman"'
Autor:
Gabriella D. Kitch, Andrew D. Jacobson, Bradley B. Sageman, Rodolfo Coccioni, Tia Chung-Swanson, Meagan E. Ankney, Matthew T. Hurtgen
Publikováno v:
Communications Earth & Environment, Vol 3, Iss 1, Pp 1-10 (2022)
Reduced carbonate precipitation rates and ocean acidification precede Ocean Anoxic Event 2 and coincide with the emplacement of large igneous provinces, suggest calcium isotopic analyses of malformed foraminifera
Externí odkaz:
https://doaj.org/article/51940e17f8694932acc9c6e7b373853e
Autor:
Benjamin J. Linzmeier, Andrew D. Jacobson, Bradley B. Sageman, Matthew T. Hurtgen, Meagan E. Ankney, Andrew L. Masterson, Neil H. Landman
Publikováno v:
PLoS ONE, Vol 17, Iss 12 (2022)
Cephalopod carbonate geochemistry underpins studies ranging from Phanerozoic, global-scale change to outcrop-scale paleoecological reconstructions. Interpreting these data hinges on assumed similarity to model organisms, such as Nautilus, and general
Externí odkaz:
https://doaj.org/article/7501f101131544998b84a9d9bee9f0fc
Autor:
Matthew M. Jones, Bradley B. Sageman, David Selby, Andrew D. Jacobson, Sietske J. Batenburg, Laurent Riquier, Kenneth G. MacLeod, Brian T. Huber, Kara A. Bogus, Maria Luisa G. Tejada, Junichiro Kuroda, Richard W. Hobbs
Publikováno v:
Nature Geoscience. 16:169-174
Publikováno v:
Geochimica et Cosmochimica Acta.
Autor:
Ireneusz Walaszczyk, William James Kennedy, Silke Voigt, Jordan Todes, Christina Ifrim, Poul Schiøler, Frank Wiese, Martin A. Pearce, Christian Linnert, Bradley B. Sageman, Danuta Peryt, James S. Crampton, Ian Jarvis, Tobias Püttmann, Seiichi Toshimitsu, Zofia Dubicka, David Uličný, Stanislav Čech, Damian Gerard Lodowski, Jackie A. Lees
Publikováno v:
Episodes. 45:181-220
Autor:
Andrew D. Jacobson, James C Zachos, Dustin T Harper, Matthew T. Hurtgen, Gabriella D. Kitch, Bradley B. Sageman
Publikováno v:
Geology. 49:723-727
Ocean acidification (OA) during the Paleocene-Eocene thermal maximum (PETM) likely caused a biocalcification crisis. The calcium isotope composition (δ44/40Ca) of primary carbonate producers may be sensitive to OA. To test this hypothesis, we constr
Publikováno v:
Geology. 49:515-519
Large igneous province (LIP) eruptions are hypothesized to trigger biocalcification crises. The Aptian nannoconid crisis, which correlates with emplacement of the Ontong Java Plateau and Oceanic Anoxic Event 1a (OAE 1a, ca. 120 Ma), represents one su
Publikováno v:
Geology. 49:412-416
Paleoclimate during the Cenomanian-Turonian Oceanic Anoxic Event 2 (OAE 2, 94.5–93.9 Ma) was characterized by elevated atmospheric CO2 concentrations and peak global temperatures. In this study, we employ δ66Zn measured on samples spanning OAE 2 i
Autor:
Zeyang Liu, Daniel E. Horton, Bradley B. Sageman, David Selby, Lawrence Percival, Clay R. Tabor, Benjamin C. Gill
Publikováno v:
Geophysical research letters, 2019, Vol.46(24), pp.14798-14806 [Peer Reviewed Journal]
The Paleocene‐Eocene Thermal Maximum is marked by a prominent negative carbon‐isotope excursion, reflecting the injection of thousands of gigatons of isotopically light carbon into the atmosphere. The sources of the isotopically light carbon rema
Autor:
Jiuyuan Wang, Bradley B. Sageman, Matthew T. Hurtgen, Benjamin J. Linzmeier, Gabriella D. Kitch, Thomas S. Tobin, Sierra V. Petersen, Andrew D. Jacobson, Meagan E. Ankney
Publikováno v:
Geology. 48:34-38
Carbon dioxide release during Deccan Traps volcanism and the Chicxulub impact likely contributed to the Cretaceous-Paleogene (K-Pg) mass extinction; however, the intensity and duration of CO2 input differed between the two events. Large and rapid add