Abstract
Paleomagnetic studies on middle and early Tertiary rocks from the Coast Range consistently find inclinations that are a few degrees shallower than predicted by reference poles for the craton. Rocks of very similar age and lithology in the Cascade Range and elsewhere in Washington and Oregon do not show this effect. This suggests that the Coast Range has moved northward several hundred kilometres, relative to stable North America. This movement could have been accomplished in a few million years prior to accretion of the Coast Range to the continent, by passive transport aboard the Kula and/or Farallon plates. Alternatively, northward displacement could reflect dextral strike-slip faulting in the North American borderland. Probably both mechanisms contributed.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
