Stable isotope analyses of belemnites from the Kachchh Basin, western India: paleoclimatic implications for the Middle to Late Jurassic transition

Journal article


Publication Details

Author(s): Alberti M, Fürsich F, Pandey DK, Ramkumar M
Journal: Facies
Publication year: 2012
Volume: 58
Journal issue: 2
Pages range: 261-278
ISSN: 0172-9179
Language: English


Abstract


Stable isotope analyses of 61 diagenetically unaltered belemnite rostra from the Middle to Late Jurassic of the Kachchh Basin of western India suggest stable paleotemperatures across the Callovian-Oxfordian boundary (~14°C). Only at the end of the Middle Oxfordian water temperatures drop for more than 3°C before reaching again higher values during the Kimmeridgian (~12. 3°C). The data do not support polar glaciations proposed for the Middle to Late Jurassic transition, which necessarily would have led to a global temperature and sea-level minimum at the boundary. Callovian to Oxfordian rocks in the Kachchh Basin point to a gradual shallowing corresponding to a slight fall in relative sea level. However, the magnitude of this regression is comparatively small, and the sea-level minimum is reached in the late Early Oxfordian and not close to the boundary. Results from the Kachchh Basin therefore, imply almost stable climatic conditions during the Middle to Late Jurassic transition and do not show any evidence for polar glaciations. © 2011 Springer-Verlag.



FAU Authors / FAU Editors

Fürsich, Franz Prof. Dr.
Naturwissenschaftliche Fakultät


Additional Organisation
Lehrstuhl für Paläoumwelt


External institutions with authors

Christian-Albrechts-Universität zu Kiel
Periyar University
University of Rajasthan


How to cite

APA:
Alberti, M., Fürsich, F., Pandey, D.K., & Ramkumar, M. (2012). Stable isotope analyses of belemnites from the Kachchh Basin, western India: paleoclimatic implications for the Middle to Late Jurassic transition. Facies, 58(2), 261-278. https://dx.doi.org/10.1007/s10347-011-0278-9

MLA:
Alberti, Matthias, et al. "Stable isotope analyses of belemnites from the Kachchh Basin, western India: paleoclimatic implications for the Middle to Late Jurassic transition." Facies 58.2 (2012): 261-278.

BibTeX: 

Last updated on 2018-08-08 at 02:55