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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/6353
Title: Early Eocene warming events and the timing of terrestrial faunal exchange between India and Asia
Authors: Clementz M.
Bajpai, Sunil
Ravikant V.
Thewissen J.G.M.
Saravanan N.
Singh I.B.
Prasad V.
Published in: Geology
Abstract: The timing of initiation of continent-continent collision between Asia and India is controversial, but this major tectonic event is generally thought to have occurred in the Early Eocene, ca. 50 Ma. New and independent data from strontium isotopes, stable carbon isotopes, microfossil biostratigraphy, and mammal fossils from an Early Eocene marginal marine sequence (Cambay Shale) at the Vastan Lignite Mine of western India indicate that terrestrial faunal exchanges, and therefore continental collision, between Asia and the Indian subcontinent took place before 53.7 Ma. This age coincides with the second Eocene Thermal Maximum (ETM2), a short-lived warming episode that followed the Paleocene-Eocene Thermal Maximum (PETM) ca. 55.5 Ma. Our data also document, for the first time, a clear record of the ETM2 in terrestrial organic material from a lowlatitude site, which is represented by a 3‰-4‰ carbon isotope excursion (CIE) in lignite and dispersed organic carbon ?13C values. The magnitude of the CIE at this location closely matches that observed in marine cores from the Arctic Ocean, which supports an interpretation that this hyperthermal event, though of lower magnitude, was similar in character to that of the PETM, being a global phenomenon that affected both terrestrial and marine ecosystems. © 2011 Geological Society of America.
Citation: Geology (2011), 39(1): 15-18
URI: https://doi.org/10.1130/G31585.1
http://repository.iitr.ac.in/handle/123456789/6353
Issue Date: 2011
ISSN: 917613
Author Scopus IDs: 6506986349
16214305000
6603495475
57205523229
36938563000
7401774897
55420017500
Author Affiliations: Clementz, M., Department of Geology and Geophysics, University of Wyoming, Laramie, WY 82071, United States
Bajpai, S., Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India
Ravikant, V., Institute Instrumentation Centre, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India, Indian Institute of Science Education and Research Kolkata, Mohanpur 741252, West Bengal, India
Thewissen, J.G.M., Department of Anatomy and Neurobiology, Northeastern Ohio Universities College of Medicine, Rootstown, OH 44272, United States
Saravanan, N., Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India
Singh, I.B., Department of Geology, Lucknow University, Lucknow 226007, India
Prasad, V., Birbal Sahni Institute of Palaeobotany, Lucknow 226007, India
Corresponding Author: Clementz, M.; Department of Geology and Geophysics, University of Wyoming, Laramie, WY 82071, United States; email: mclemen1@uwyo.edu
Appears in Collections:Journal Publications [ES]

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