Tseax River Cone

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  • Canada
  • Canada
  • Pyroclastic cone
  • 1690 CE
  • Country
  • Subregion Name
  • Primary Volcano Type
  • Last Known Eruption
  • 55.12°N
  • 128.9°W

  • 609 m
    1998 ft

  • 320100
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

There are no activity reports for Tseax River Cone.



 Available Weekly Reports

There are no Weekly Reports available for Tseax River Cone.

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

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
1690 ± 150 years Unknown Confirmed   Radiocarbon (corrected)
1330 ± 75 years Unknown Confirmed   Radiocarbon (uncorrected)

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.

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.

Higgins M D, 2009. The Cascadia megathrust earthquake of 1700 may have rejuvenated an isolated basalt volcano in western Canada: age and petrographic evidence. J Volc Geotherm Res, 179: 149-156.

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

Sutherland-Brown A, 1969. Aiyansh lava flow, British Columbia. Can J Earth Sci, 6: 1460-1468.

Wuorinen V, 1978. Age of Aiyansh volcano, British Columbia. Can J Earth Sci, 15: 1037-1038.

The basaltic Tseax River cinder cones (Aiyansh volcano) at the southern end of the Stikine volcanic belt have been the site of some of the youngest volcanic eruptions in Canada. Nested cinder cones lying along a tributary of the Nass River were the source of a lava flow that traveled into the Tseax River, damming it and forming Lava Lake. The flow subsequently traveled 11 km north to the Nass River, where it filled the flat valley floor for an additional 10 km. Native legends of the Nisga'a People tell of a prolonged period of disruption by the volcano, including the destruction of their village on the Nass River and the death of some people from "poison smoke." The vent was active at least twice (625 and 220 radiocarbon years ago) and other remnants of lava flows exist in the area, which was designated the Nisga'a Memorial Lava Beds Provincial Park in 1993 (Hickson and Edwards, 2001).