The '''Mount Barr Plutonic Complex (MBPC)''' is a circular body of intrusive rock in the Cascade Mountains of southern British Columbia, Canada. It is located {{nowrap|{{Convert|19|km|mi|abbr=on}}}} southwest of the district municipality of Hope, centered around Wahleach Lake. The complex takes its name from Mount Barr, one of many mountains consisting of MBPC intrusive rocks.<ref name="ZK">{{cite journal|last1=Richards|first1=T.|last2=White|first2=W. H.|journal=Canadian Journal of Earth Sciences|title=K-Ar ages of plutonic rocks between Hope, British Columbia, and the 49th parallel|publisher=NRC Research Press|location=Ottawa, Ontario|volume=7|pages=1204, 1205, 1206|year=1970|issn=0008-4077|doi=10.1139/e70-115}}</ref>

Three granitoid intrusions of Miocene age comprise the MBPC. The largest intrusion consists of rocks ranging from quartz diorite to quartz monzonite and makes up 80% of the complex. Two younger stocks are situated within the main intrusion and consist of quartz monzonite. K–Ar dating of the MBPC has given ages ranging from 21&nbsp;to 16&nbsp;million years old.<ref name="ZK"/>

==References== {{reflist}}

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{{DEFAULTSORT:Barr}} Category:Skagit Range Category:Landforms of Lower Mainland Category:Pemberton Volcanic Belt Category:Stocks (geology) Category:Miocene magmatism Category:Igneous petrology of British Columbia Category:Miocene British Columbia

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