Alligator Lake

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  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 60.42°N
  • 135.42°W

  • 2217 m
    7272 ft

  • 320020
  • Latitude
  • Longitude

  • Summit

  • Volcano

The Global Volcanism Program has no activity reports for Alligator Lake.

The Global Volcanism Program has no Weekly Reports available for Alligator Lake.

The Global Volcanism Program has no Bulletin Reports available for Alligator Lake.

Volcano Types

Volcanic field

Tectonic Setting

Continental crust (> 25 km)

Rock Types

Basalt / Picro-Basalt
Trachybasalt / Tephrite Basanite


Within 5 km
Within 10 km
Within 30 km
Within 100 km

Geological Summary

A group of basaltic cones and lava flows (the Miles Canyon basalts) in south-central Yukon near the capital city of Whitehorse was considered to be of Pleistocene age (Wheeler, 1961). The upper part of the Alligator Lake volcanic complex, consisting of two well-preserved cinder cones capping a small shield volcano, probably post-dates local Holocene glaciation (Eiche et al., 1987). Lava flows from both cones traveled to the north and were erupted simultaneously. Their compositions range from alkali olivine basalt to basanitic. Flows from the NE cone are the largest, extending 6 km from the cone and expanding to a width of 10 km at the terminus. Portions of the flows contain spinel lherzolite and granitoid xenoliths and megacrysts of olivine, pyroxene, and spinel.

The Global Volcanism Program is not aware of any Holocene eruptions from Alligator Lake. If this volcano has had large eruptions (VEI >= 4) prior to 10,000 years ago, information might be found on the Alligator Lake page in the LaMEVE (Large Magnitude Explosive Volcanic Eruptions) database, a part of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).

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.


Feature Name Feature Type Elevation Latitude Longitude
Ibex Mountain Cone Cone 1675 m 60° 32' 0" N 135° 31' 0" W

Photo Gallery

The two small reddish-brown areas near the center of this NASA Landsat image (with north to the top) are cinder cones of the Alligator Lake volcanic field. This group of basaltic cones and lava flows lies SW of the city of Whitehorse (out of view to the upper right) and west of the northern tip of Alligator Lake (right-center). Lava flows from the two cinder cones topping a small shield volcano traveled to the north. The alkali olivine basalt to basanitic lava flows are about 6 x 10 km in width and contain abundant xenoliths.

NASA Landsat7 image (


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.

Eiche G E, Francis D M, Ludden J N, 1987. Primary alkaline magmas associated with the Quaternary Alligator Lake volcanic complex, Yukon Territory, Canada. Contr Mineral Petr, 95: 191-201.

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..

Wheeler J O, 1961. Whitehorse map-area, Yukon Territory, 105D. Geol Suv Can Mem, 312: 1-156.

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

Affiliated Databases

Large Eruptions of Alligator Lake 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.