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Title: Advent of strong South Asian monsoon by 20 million years ago
Authors: Retallack G.J.
Bajpai, Sunil
Liu X.
Kapur V.V.
Pandey S.K.
Published in: Journal of Geology
Abstract: The monsoonal paleoclimate of India has been critical for understanding the tectonic history of Himalayan and Tibetan uplift over the past 60My.Monsoonal circulation in deep time has been inferred fromvariation in stable isotopes of tooth enamel, diatomblooms, and dust influx in the Indian Ocean and the advent of C4 grasses, but these proxies are compromised by temperature, biotic, and source effects. Our study uses a proxy of carbonate distribution within paleosol profiles to infer appearance ofmonsoonal circulation ofmodern strength in theHimachal Pradesh segment of the Himalayan foreland by at least 20 My ago, cued to HighHimalayan deformation and ongoing Tibetan Plateau uplift and retreat of the Paratethys Sea. Paleosol records also demonstrate declining chemical weathering with Himalayan and Tibetan uplift, which was a force for global warming, rather than cooling, over the past 20 My. © 2017 by The University of Chicago. All rights reserved.
Citation: Journal of Geology (2018), 126(1): 1-24
Issue Date: 2018
Publisher: University of Chicago Press
ISSN: 221376
Author Scopus IDs: 7005630111
Author Affiliations: Retallack, G.J., Department of Geological Sciences, University of Oregon, Eugene, OR 97403-1272, United States
Bajpai, S., Birbal Sahni Institute of Palaeobotany, 53 University Road, Lucknow, 226007, India
Liu, X., School of Geographical Sciences, Fujian Normal University, Fuzhou, 350007, China
Kapur, V.V., Birbal Sahni Institute of Palaeobotany, 53 University Road, Lucknow, 226007, India
Pandey, S.K., Birbal Sahni Institute of Palaeobotany, 53 University Road, Lucknow, 226007, India
Funding Details: Discussions with A. Sahni, J. Roering, and N. Shel-don greatly improved the manuscript, as did reviews of previous versions by P. DeCelles and J. Quade. For assistance during fieldwork in India we thank M. Sharma and S. R. Mishra, and for help in China M. Yu, H. Ge, and X. Gou. Chinese fieldwork was funded by National Science Foundation of China grant 41210002 to X. Liu.
Corresponding Author: Retallack, G.J.; Department of Geological Sciences, University of OregonUnited States; email:
Appears in Collections:Journal Publications [ES]

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