Duncan Canal volcanic field
Facts
- Seismically Monitored: No
- Color Code: UNASSIGNED
- Alert Level: UNASSIGNED
- Elevation: 15m (49ft)
- Latitude: 56.5
- Longitude: -133.1
- Smithsonian VNum: 315050
- Pronunciation:
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Nearby Towns:
- Kupreanof 22.2 mi (35.7 km) NNE
- Petersburg 22.3 mi (35.9 km) NNE
- Point Baker 22.4 mi (36 km) WSW
- Port Protection 23 mi (37.1 km) WSW
- Whale Pass 26.6 mi (42.8 km) S
Distance from Anchorage: 680.3 mi (1094.9 km)
Description
From Wood and Kienle (1990) [1] : "Olivine-bearing tholeiitic basalt with average K-content, together with minor sodic alkalic basalts, overlie volcanic-rich gravel and glacial till along the southern coast of Kupreanof Island west of Duncan Canal. The flows are recognized in the field by their conspicuous fresh-appearing pahoehoe and aa surfaces. Two probable vents lie within the Mesozoic and Paleozoic rocks of the Duncan Canal fault zone north of the main exposures; the northern one contains scattered peridotite nodules. The relations of the main exposures to the subjacent middle Tertiary volcanic rocks of the Kuiu-Etolin volcanicplutonic belt are not clear at the western end of the field because the Holocene basalt is difficult to differentiate from the adjacent older basalt."Name Origin
"Duncan Canal volcanic field", as applied to the group of volcanic vents near the Duncan Canal waterway, is an informal name.
References Cited
[1] Volcanoes of North America: United States and Canada, 1990
Wood, C. A., and Kienle, Juergen, (eds.), 1990, Volcanoes of North America: United States and Canada: New York, Cambridge University Press, 354 p.Loading Past Activity...
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Before an eruption
Ashfall & Preparedness Information
- Ashfall impacts & preparedness (US Geological Survey)
- Volcanic health hazards & impacts (International Volcanic Health Hazards Network)
- Ash Alert! Pamphlet (AK Division of Homeland Security & Emergency Management)
- Volcanic Ashfall (AK Department of Environmental Conservation, Division of Air Quality)
During and After an Eruption
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