# Spences Bridge Group

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The '''Spences Bridge Group''' is a 100-million-year-old [volcanic group](/source/volcanic_group) of the southern [Intermontane Belt](/source/Intermontane_Belt) in [British Columbia](/source/British_Columbia), [Canada](/source/Canada). It consists of two [stratigraphic](/source/stratigraphy) units called the [Pimainus Formation](/source/Pimainus_Formation) and the [Spius Formation](/source/Spius_Formation).<ref name="SI">{{Cite web |url=http://www.sfu.ca/~dthorkel/linked/thork%20and%20smith%20sbg%201989.pdf |title=Arc and intraplate volcanism in the Spences Bridge Group: Implications for Cretaceous tectonics in the Canadian Cordillera |access-date=2023-05-26 |archive-date=2019-12-22 |archive-url=https://web.archive.org/web/20191222021141/http://www.sfu.ca/~dthorkel/linked/thork%20and%20smith%20sbg%201989.pdf |url-status=live }}</ref> The Spius Formation represents a [shield volcano](/source/shield_volcano) whereas the underlying Pimainus Formation is interpreted to be a set of [stratovolcano](/source/stratovolcano)es.<ref name="SI"/>

==See also==
*[Volcanism of Canada](/source/Volcanism_of_Canada)
*[Volcanism of Western Canada](/source/Volcanism_of_Western_Canada)

==References==
{{reflist}}

Category:Extinct volcanoes of British Columbia
Category:Cretaceous volcanoes
Category:Volcanic groups
Category:Thompson Country
Category:Geologic groups of British Columbia
Category:Cretaceous British Columbia
Category:Shield volcanoes of Canada
Category:Stratovolcanoes of Canada

{{BritishColumbia-geology-stub}}

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Adapted from the Wikipedia article [Spences Bridge Group](https://en.wikipedia.org/wiki/Spences_Bridge_Group) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Spences_Bridge_Group?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.