Silverthrone

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  • Canada
  • Canada
  • Caldera
  • Unknown
  • Country
  • Subregion Name
  • Primary Volcano Type
  • Last Known Eruption
  • 51.43°N
  • 126.3°W

  • 3160 m
    10365 ft

  • 320160
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

There are no activity reports for Silverthrone.



 Available Weekly Reports

There are no Weekly Reports available for Silverthrone.

There are no Holocene eruptions known for Silverthrone. If this volcano has had large eruptions prior to 10,000 years ago, information might be found in the LaMEVE (Large Magnitude Explosive Volcanic Eruptions) database, a part of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).

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.

Blake W, 1985. Geological Survey of Canada radiocarbon dates XXV. Geol Surv Can Pap, 85: 19.

Green N L, Armstrong R L, Harakal J E, Souther J G, Read P B, 1988. Eruptive history and K-Ar geochronology of the late Cenozoic Garibaldi volcanic belt, southwestern British Columbia. Geol Soc Amer Bull, 100: 563-579.

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..

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

The Silverthrone volcanic complex lies near the coast in SW British Columbia NW of the head of Knight Inlet. Silverthrone is a roughly circular, 20-km-wide, deeply dissected caldera complex containing rhyolitic, dacitic and andesitic lava domes, flows and breccia. The bulk of the complex appears to have been erupted between 0.1 and 0.5 million years ago (Ma), but postglacial andesitic and basaltic-andesite cones and lava flows are also present. Anomalously old Potassium-Argon (K-Ar) dates of 1.0 and 1.1 Ma were obtained from a lava flow in the postglacial Pashleth and Machmel Creek valleys (Green et al., 1988). This flow is clearly much younger than the K-Ar date, and high-energy glacial streams have only begun to etch a channel along the margin of the flow. A radiocarbon date from barnacles 8.5 km upstream from the mouth of Machmel River and buried by the flow yielded an age of 12,200 +/- 140 years (Blake, 1985). This is a maximum age for the flow, which could be much younger (Hickson and Edwards, 2001).