Prindle Volcano

{{Short description|Cinder cone in Canada}}

Prindle Volcano is an isolated basaltic cinder cone located in eastern Alaska, United States, in the headwaters of the East Fork of the Fortymile River, approximately 80 kilometers northeast of Tok, Alaska. The cone is fresh-looking and has a base approximately {{convert|900|m|yd|abbr=off}} wide. It is the northwesternmost expression of the Northern Cordilleran Volcanic Province. The cinder cone, and an approximately {{convert|11|km|mi||adj=on|abbr=off}} long lava flow which breached the margin of the cone, erupted in the Pleistocene approximately 176,000 years ago.[http://geology.gsapubs.org/content/35/1/17.abstract "Dating young basalt eruptions by (U-Th)/He on xenolithic zircons" Geology, v. 35 no. 1 p. 17-20, 2006 doi: 10.1130/G22956A.1] The lava flow extends to the southeast, then turns southwest and continues in a river valley.{{Cite book |last=Wood |first=Charles A. |url=https://books.google.com/books?id=eyDRib-FJh4C&dq=Prindle+Volcano&pg=PA109 |title=Volcanoes of North America: United States and Canada |date=1992-11-27 |publisher=Cambridge University Press |isbn=978-0-521-43811-7 |language=en}}

Rocks forming the Prindle Volcano occur within, and penetrated through, the Yukon–Tanana upland which is a large region of mostly Paleozoic-Mesozoic metamorphosed and deformed sedimentary, volcanic, and intrusive rocks that are intruded by younger Cretaceous and Cenozoic granitic rocks.{{cite web|url=http://www.avo.alaska.edu/volcanoes/volcinfo.php?volcname=Prindle%20Volcano |title=Prindle Volcano - Introduction |publisher=Avo.alaska.edu |date=2013-09-24 |access-date=2013-10-16}} Xenoliths in the volcano's ejecta provide a sample of lower crust material.{{cite web|url=http://www.avo.alaska.edu/pdfs/P0550B_p115to119.pdf |title=Granulite and Peridotite Inclusions from Prindle Volcano, Yukon–Tanana Upland, Alaska |publisher=Avo.alaska.edu |access-date=2013-10-16}}{{cite journal|title=Granulite facies xenoliths from Prindle volcano, Alaska: Implications for the northern Cordilleran crustal lithosphere |date=2008-03-31 |doi=10.1016/j.lithos.2007.07.016|volume=101|journal=Lithos|pages=344–358|last1=Ghent |first1=Edward D. |last2=Edwards |first2=Benjamin R. |last3=Russell |first3=J.K. |last4=Mortensen |first4=James |issue=3–4 }}