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Iskut-Unuk River Cones

Google Earth Placemark
  • Canada
  • Canada
  • Cinder cone
  • 1800
  • Country
  • Subregion Name
  • Volcano Type
  • Last Known Eruption
  • 1880 m
    6166 ft
  • 56.580°
  • -130.550°
  • Elevation
  •  
  • Latitude
  • Longitude

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
620 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

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.