Iskut-Unuk River Cones

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  • Canada
  • Canada
  • Cinder cone(s)
  • 1800 CE
  • Country
  • Subregion Name
  • Primary Volcano Type
  • Last Known Eruption
  • 56.58°N
  • 130.55°W

  • 1880 m
    6166 ft

  • 320090
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

There are no activity reports for Iskut-Unuk River Cones.



 Available Weekly Reports

There are no Weekly Reports available for Iskut-Unuk River Cones.

Summary of eruption dates and Volcanic Explosivity Indices (VEI).

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
[ 1904 ] [ Unknown ] Uncertain     Lava Fork
1800 (?) Unknown Confirmed   Radiocarbon (uncorrected) Lava Fork
1590 ± 50 years Unknown Confirmed   Radiocarbon (uncorrected) Lava Fork
0620 BCE ± 150 years Unknown Confirmed   Radiocarbon (uncorrected) Iskut River
1830 BCE ± 300 years Unknown Confirmed   Radiocarbon (uncorrected) Iskut River
3450 BCE ± 150 years Unknown Confirmed   Radiocarbon (uncorrected) Iskut River
4700 BCE ± 300 years Unknown Confirmed   Radiocarbon (uncorrected) Iskut River
6830 BCE ± 150 years Unknown Confirmed   Radiocarbon (uncorrected) Iskut River

The following references are the sources used for data regarding this volcano. References are linked directly to our volcano data file. Discussion of another volcano or eruption (sometimes far from the one that is the subject of the manuscript) may produce a citation that is not at all apparent from the title. Additional discussion of data sources can be found under Volcano Data Criteria.

Edwards B R, Russell J K, Anderson R G, 2002. Subglacial, phonolitic volcanism at Hoodoo Mountain volcano, northern Canadian Cordillera. Bull Volc, 64: 254-272.

Elliott R L, Koch R D, Robinson S W, 1981. Age of basalt flows in the Blue River valley, Bradfield Canal quadrangle. U S Geol Surv Circ, 823-B: 115-116.

Grove E W, 1976. Deglaciation a possible triggering mechanism for recent volcanism. In: Gonzalez-Ferran O (ed) {Proc Symp Andean & Antarctic Volcanology Problems (Santiago, Chile, Sept 1974)}, Rome: IAVCEI, p 88-97.

Hauksdottir S, Enegren E G, Russell J K, 1994. Recent basaltic volcanism in the Iskut-Unuk rivers area, northwestern British Columbia. Geol Surv Can Pap, 94-1A: 57-67.

Hickson C J, Edwards B R, 2001. Volcanoes and Volcanic Hazards in Canada. In; Brooks G R (ed) {A Synthesis of Geological Hazards in Canada}, Geol Surv Can Bull, 548: 1-248.

Hickson C J, Soos A, Wright R, 1994. Catalogue of Canadian volcanoes. Geol Surv Canada Open-File Rpt.

Holland S S, 1976. Landforms of British Columbia, a physiographic outline. Brit Columbia Dept Mines Petrol Resour Bull, 48: 1-138 (2nd printing).

IAVCEI, 1973-80. Post-Miocene Volcanoes of the World. IAVCEI Data Sheets, Rome: Internatl Assoc Volc Chemistry Earth's Interior..

Kerr F A, 1948. Lower Stikine and western Iskut River areas, British Columbia. Geol Surv Can Mem, 246: 1-94.

Souther J G, 1977a. Volcanism and tectonic environments in the Canadian Cordillera, a second look. Geol Assoc Can Spec Pap, 16: 3-24.

Stasiuk M V, Russell J K, 1990. Quaternary volcanic rocks of the Iskut River region, northwestern British Columbia. Geol Surv Can Pap, 90-1E: 153-157.

Wood C A, Kienle J (eds), 1990. Volcanoes of North America. Cambridge, England: Cambridge Univ Press, 354 p.

Wright F E, 1906. Unuk River mining region. Ann Rpt Ministry Mines, Brit Columbia (1905), p 68-74.

Eight small basaltic centers at the southern end of the Stikine volcanic belt near the Alaska border comprise the Iskut-Unuk River Cone Group, one of the youngest volcanic centers in Canada. Lava flows date back 70,000 years, but the subaerial vents produced cinder cones and lava flows that were probably all active between about 9000 and a few hundred years ago. Five of the centers produced lava flows that traveled up to about 20 km down the Iskut and Unuk River valleys and their tributaries. The three remaining centers are products of ice-contact volcanism that formed pillow lava, hyaloclastite breccias, and scoria. The Iskut-Unuk flows are similar in mineralogy and contain abundant crustal xenoliths. Vents in the Iskut River Canyon area produced at least 10 lava flows and the Lava Fork vents at least three, the latest of which erupted within the past few hundred years.