Zobrazeno 1 - 8
of 8
pro vyhledávání: '"Meagan E. Ankney"'
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:
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
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. 17(12)
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
Publikováno v:
Geochimica et Cosmochimica Acta. 213:137-154
We report new whole rock U-Th and in-situ oxygen isotope compositions for partially melted (0–50 vol% melt), low-δ18O Pleistocene granitoid blocks ejected during the ∼7.7 ka caldera-forming eruption of Mt. Mazama (Crater Lake, Oregon). The block
Publikováno v:
Earth and Planetary Science Letters. 437:25-34
Interaction of mantle melts with the continental crust can have significant effects on the composition of the resulting melts as well as on the crust itself, and tracing this interaction is key to our understanding of arc magmatism. Lava flows and py
Autor:
Neil H. Landman, Meagan E. Ankney, Matthew T. Hurtgen, Andrew D. Jacobson, Bradley B. Sageman, Benjamin J. Linzmeier
Publikováno v:
Geological Society of America Abstracts with Programs.
Publikováno v:
Contributions to Mineralogy and Petrology. 166:563-585
Uranium-series isotope ratios determined for 35 volcanic rocks and 4 glass separates erupted from ~36 to 4.8 ka at Mt. Mazama, Crater Lake, Oregon, identify both 230Th-excess and 238U-excess components. U–Th isotope compositions cover a wide range,