Abstract
The trend of marine87Sr/86Sr against stratigraphic level through sections, whether linear or not, can identify hiatuses and changing rates of sedimentation through those sections and so be a valuable constraint on attempts to assign numerical ages to sediments on the basis of astrochronology or U/Pb dating of zircons. Here we illustrate that value for the Campanian, Pliensbachian, Toarcian, and Valanginian ages by comparing87Sr/86Sr profiles for different localities and comparing those to the87Sr/86Sr profile through time. The analysis reveals possible problems both with current time scales and with some astrochronological calibrations. Our analysis is neither comprehensive nor final; rather, with a few examples, we show how Sr-isotope stratigraphy can be used to moderate other methods of assigning numerical ages to sediments.
DOI
10.1086/687395
Publication Date
2016-09-01
Publication Title
The Journal of Geology
Volume
124
Issue
5
Publisher
University of Chicago Press
ISSN
1537-5269
Embargo Period
2024-11-25
First Page
569
Last Page
586
Recommended Citation
McArthur, J., Steuber, T., Page, K., & Landman, N. (2016) 'Sr-Isotope Stratigraphy: Assigning Time in the Campanian, Pliensbachian, Toarcian, and Valanginian', The Journal of Geology, 124(5), pp. 569-586. University of Chicago Press: Available at: https://doi.org/10.1086/687395
