Hoodoo Mountain

Photo of this volcano
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  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 56.78°N
  • 131.28°W

  • 1850 m
    6068 ft

  • 320080
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

The Global Volcanism Program has no activity reports for Hoodoo Mountain.

The Global Volcanism Program has no Weekly Reports available for Hoodoo Mountain.

The Global Volcanism Program has no Bulletin Reports available for Hoodoo Mountain.

Hoodoo Mountain is a flat-topped Pleistocene-to-Holocene volcano in the Boundary Ranges of NW British Columbia near the Alaska border that is composed of both subglacial and subaerial volcanic products. Valley glaciers surround the volcano on all except the south side. The Pleistocene Little Bear Mountain basaltic tuya adjoins Hoodoo Mountain on the immediate north. Most of the volcano formed beneath glacial ice; all flank flows appear to have originated from beneath the current 4-km-wide summit icecap. More than 90% of the volcano, which dates back to at least 100,000 years, consists of interlayered peralkaline phonolitic and trachytic lava flows and hyaloclastites. At least one subaerial explosive eruption produced a welded and unwelded ignimbrite sequence on the north side. The most recent stage of volcanic activity produced subaerial unglaciated lava flows with well-preserved lava channels that originated from summit and flank vents about 9000 years ago.

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

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
7050 BCE (?) Unknown Confirmed 0 Tephrochronology

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.


Cones

Feature Name Feature Type Elevation Latitude Longitude
Little Bear Mountain Tuya 1180 m 56° 48' 0" N 131° 12' 0" W
Hoodoo Mountain, as seen from the SE across the Iskut River in northwestern British Columbia, is a flat-topped stratovolcano. It has an ice cap 3 km in diameter and has had several periods of subglacial eruptions. Most of the volcanic deposits at Hoodoo Mountain are lava flows. The oldest eruptions of the volcano occurred about 100,000 years ago and the most recent eruptions about 9000 years ago. Hoodoo Mountain volcanic complex is one of the largest peralkaline volcanoes in the northern Cordilleran volcanic province.

Photo by Ben Edwards, 1994 (Dickinson College, Pennsylvania).

The following references have all been used during the compilation of data for this volcano, it is not a comprehensive bibliography. 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.

Edwards B R, Edwards G, Russell J K, 1995. Revised stratigraphy for the Hoodoo Mountain volcanic centre, northwestern British Columbia. Geol Surv Can, Current Res. 1995-A: 105-115.

Edwards B R, Russell J K, 1994. Preliminary stratigraphy of Hoodoo Mountain volcanic centre, northwestern British Columbia. Geol Surv Can Pap, 94-1A: 69-76.

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.

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.

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.

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

Volcano Types

Subglacial
Pyroclastic cone(s)

Tectonic Setting

Intraplate
Continental crust (> 25 km)

Rock Types

Major
Phonolite
Trachyte / Trachyandesite
Minor
Basalt / Picro-Basalt

Population

Within 5 km
Within 10 km
Within 30 km
Within 100 km
0
0
0
2,330

Affiliated Databases

Large Eruptions of Hoodoo Mountain Information about large Quaternary eruptions (VEI >= 4) is cataloged in the Large Magnitude Explosive Volcanic Eruptions (LaMEVE) database of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).
WOVOdat WOVOdat is a database of volcanic unrest; instrumentally and visually recorded changes in seismicity, ground deformation, gas emission, and other parameters from their normal baselines. It is sponsored by the World Organization of Volcano Observatories (WOVO) and presently hosted at the Earth Observatory of Singapore.
EarthChem EarthChem develops and maintains databases, software, and services that support the preservation, discovery, access and analysis of geochemical data, and facilitate their integration with the broad array of other available earth science parameters. EarthChem is operated by a joint team of disciplinary scientists, data scientists, data managers and information technology developers who are part of the NSF-funded data facility Integrated Earth Data Applications (IEDA). IEDA is a collaborative effort of EarthChem and the Marine Geoscience Data System (MGDS).
Smithsonian Collections Search the Smithsonian's NMNH Department of Mineral Sciences collections database. Go to the "Search Rocks and Ores" tab and use the Volcano Name drop-down to find samples.