Abstract
Volcanics from the Arisaig-Antigonish district of northeastern Nova Scotia underlie fossiliferous Lower Silurian (Lower Llandovery) sediments. The minimum geologic age of the volcanics is Early Silurian, and the maximum geologic age probably is post-Early Ordovician. Twelve whole-rock samples of the volcanics were analyzed for rubidium, strontium, and strontium isotopic composition. The best estimate of the age of these twelve samples is 430 ± 15 m.y.; this is a maximum age or close to a maximum age for the Ordovician–Silurian boundary. This age plus the authors' results for the Silurian-Devonian boundary indicate that the Silurian Period in northeastern North America may have been shorter than generally has been estimated. Additional Silurian-age volcanics are being analyzed.
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.
