Oxfordian magnetostratigraphy of Britain and its correlation to Tethyan regions and Pacific marine magnetic anomalies
Abstract
A suite of 11 sections through the Oxfordian (Upper Jurassic) strata in the Dorset and Yorkshire regions of England and the Isle of Skye in Scotland yielded magnetic polarity patterns directly calibrated to the ammonite biostratigraphy of the Boreal and the Subboreal faunal provinces. The sections include the leading candidate for the global stratotype (GSSP) for the Callovian–Oxfordian stage boundary. The mean Oxfordian paleomagnetic pole derived from the Dorset and Yorkshire sections is 71.3°N, 172.6°E (δp = 4.2°, δm = 6.1°). The integrated magneto-biostratigraphic scale is consistent with results from the Sub-Mediterranean faunal province and extends the polarity pattern to the base of the Oxfordian. After adjusting for the estimated durations of ammonite subzones from cycle stratigraphy, the magnetostratigraphy confirms models for marine magnetic anomalies M30 through to M37, including some of the short-duration features recorded by deep-tow magnetic surveys in the western Pacific. The Callovian–Oxfordian boundary (base of Quenstedtoceras mariae Zone) occurs in a normal-polarity zone that is correlated to the youngest part of polarity chron M37n of this extension to the M-sequence.
Keywords
magnetostratigraphy, oxfordian, ammonite zonation, boreal realm United Kindom
Date of this Version
2010
DOI
http://dx.doi.org/10.1016/j.epsl.2009.11.031
Repository Citation
Ogg, James G.; Coe, Angela L.; Przybylski, Piotr A.; and Wright, John K., "Oxfordian magnetostratigraphy of Britain and its correlation to Tethyan regions and Pacific marine magnetic anomalies" (2010). Department of Earth, Atmospheric, and Planetary Sciences Faculty Publications. Paper 66.
http://dx.doi.org/http://dx.doi.org/10.1016/j.epsl.2009.11.031
Volume
289
Issue
3-4
Pages
433-448
Link Out to Full Text
http://www.sciencedirect.com/science/article/pii/S0012821X09006931