East African weathering dynamics controlled by vegetation-climate feedbacks
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Final Accepted Manuscript
Author
Ivory, Sarah J.McGlue, Michael M.
Ellis, Geoffrey S.
Boehlke, Adam
Lézine, Anne-Marie
Vincens, Annie
Cohen, Andrew S.
Affiliation
Univ Arizona, Dept GeosciIssue Date
2017-09
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GEOLOGICAL SOC AMER, INCCitation
Sarah J. Ivory, Michael M. McGlue, Geoffrey S. Ellis, Adam Boehlke, Anne-Marie Lézine, Annie Vincens, Andrew S. Cohen; East African weathering dynamics controlled by vegetation-climate feedbacks. Geology ; 45 (9): 823–826. doi: https://doi.org/10.1130/G38938.1Journal
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© 2017 Geological Society of America.Collection Information
This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.Abstract
Tropical weathering has important linkages to global biogeochemistry and landscape evolution in the East African rift. We disentangle the influences of climate and terrestrial vegetation on chemical weathering intensity and erosion at Lake Malawi using a long sediment record. Fossil pollen, microcharcoal, particle size, and mineralogy data affirm that the detrital clays accumulating in deep water within the lake are controlled by feedbacks between climate and hinterland forest composition. Particle-size patterns are also best explained by vegetation, through feedbacks with lake levels, wildfires, and erosion. We develop a new source-to-sink framework that links lacustrine sedimentation to hinterland vegetation in tropical rifts. Our analysis suggests that climate-vegetation interactions and their coupling to weathering/erosion could threaten future food security and has implications for accurately predicting petroleum play elements in continental rift basins.Note
12 month embargo; published online: 26 July 2017ISSN
0091-7613DOI
10.1130/G38938.1Version
Final accepted manuscriptSponsors
U.S. National Science Foundation [EAR-0602404]; U.S. Geological Survey; American Chemical Society-Petroleum Research Fund program [54376-DNI8]Additional Links
http://pubs.geoscienceworld.org/geology/article/45/9/823/353462/East-African-weathering-dynamics-controlled-byae974a485f413a2113503eed53cd6c53
10.1130/G38938.1