Tseax River Cone

Photo of this volcano
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 55.12°N
  • 128.9°W

  • 609 m
    1998 ft

  • 320100
  • Latitude
  • Longitude

  • Summit

  • Volcano

The Global Volcanism Program has no activity reports for Tseax River Cone.

The Global Volcanism Program has no Weekly Reports available for Tseax River Cone.

The Global Volcanism Program has no Bulletin Reports available for Tseax River Cone.

Eruptive History

Summary of Holocene 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)

This compilation of synonyms and subsidiary features may not be comprehensive. Features are organized into four major categories: Cones, Craters, Domes, and Thermal Features. Synonyms of features appear indented below the primary name. In some cases additional feature type, elevation, or location details are provided.

Photo Gallery

The 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. This photo shows a tumulus in the middle of a broad lava plain in the Nass River valley produced by the Tseax River flow, which traveled 22.5 km. The flows are the prime attraction of the Nisga'a Memorial Lava Beds Provincial Park. The volcanic field erupted at least twice (625 and 220 radiocarbon years ago), and activity was noted in tribal legends.

Photo by Ben Edwards (Dickinson College, Pennsylvania).
See title for photo information.

Smithsonian Sample Collections Database

There are no samples for Tseax River Cone in the Smithsonian's NMNH Department of Mineral Sciences Rock and Ore collection.

Affiliated Sites