12,772 research outputs found
Biogeochemical redox proxies in sediments from Yorkshire during the Toarcian (Early Jurassic)
No full textAuthor contributions:
The lead author is Angela L. Coe. Measurements were performed by Stephan M. Harding, with supervision of Angela L. Coe and Anthony S. Cohen. Measurements were gathered, processed and analysed by Itzel Ruvalcaba Baroni
Biogeochemical redox proxies in sediments from Dotternhausen during the Toarcian (Early Jurassic)
No full textAuthor contributions:
The lead author is Angela L. Coe. Measurements were performed by Stephan M. Harding, with supervision of Angela L. Coe and Anthony S. Cohen. Measurements were gathered, processed and analysed by Itzel Ruvalcaba Baroni
Robert Cohen
No full textRobert Cohen, director of Anthony and Celopatra at the 1985 Utah Shakespeare Festival.photograp
Interview with Anthony F. Janson
No full textAnthony F. Janson is a retired professor and former Department Chair for the UNCW Department of Art and Theatre [retired December 2002]. This interview covers his complete life and career. He discusses his relationship with his art historian father, H.W. Janson, including his relationship as son and co-author and editor of the Janson texts on art history. The interview covers Tony's career as a scholar, book editor, author, art museum curator [at Indianapolis Art Museum and North Carolina Art Museum], and as a professor. Throughout, he comments on important artists in history and his philosophy of art history. He also includes stories of his time in the Vietnam War
Interview with Anthony F. Janson
No full textAnthony F. Janson is a retired professor and former Department Chair for the UNCW Department of Art and Theatre [retired December 2002]. This interview covers his complete life and career. He discusses his relationship with his art historian father, H.W. Janson, including his relationship as son and co-author and editor of the Janson texts on art history. The interview covers Tony's career as a scholar, book editor, author, art museum curator [at Indianapolis Art Museum and North Carolina Art Museum], and as a professor. Throughout, he comments on important artists in history and his philosophy of art history. He also includes stories of his time in the Vietnam War
Seawater redox variations during the deposition of the Kimmeridge Clay Formation, United Kingdom (Upper Jurassic): evidence from molybdenum isotopes and trace metal ratios
No full textThe Kimmeridge Clay Formation (KCF) and its equivalents worldwide represent one of the most prolonged periods of organic carbon accumulation of the Mesozoic. In this study, we use the molybdenum (Mo) stable isotope system in conjunction with a range of trace metal paleoredox proxies to assess how seawater redox varied both locally and globally during the deposition of the KCF. Facies with lower organic carbon contents (TOC 1–7 wt %) were deposited under mildly reducing (suboxic) conditions, while organic-rich facies (TOC >7 wt %) accumulated under more strongly reducing (anoxic or euxinic) local conditions. Trace metal abundances are closely linked to TOC content, suggesting that the intensity of reducing conditions varied repeatedly during the deposition of the KCF and may have been related to orbitally controlled climate changes. Long-term variations in ?98/95Mo are associated with the formation of organic-rich intervals and are related to third-order fluctuations in relative sea level. Differences in the mean ?98/95Mo composition of the organic-rich intervals suggest that the global distribution of reducing conditions was more extensive during the deposition of the Pectinatites wheatleyensis and lower Pectinatites hudlestoni zones than during the deposition of the upper Pectinatites hudlestoni and Pectinatites pectinatus zones. The global extent of reducing conditions during the Kimmerigidan was greater than today but was less widespread than during the Toarcian (Early Jurassic) oceanic anoxic event. This study also demonstrates that the Mo isotope system in Jurassic seawater responded to changes in redox conditions in a manner consistent with its behavior in present-day sedimentary environment
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Letter from Anthony Brummelkamp to Mrs. G. Groen van Prinsterer
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