Chagulak - Introduction

LOCATION

FACTS

Official Name:	Chagulak Island
Type:	Stratovolcano
Most Recent Activity:
Seismically Monitored:	No
Elevation:	3747 ft (1142 m)
Latitude:	52.5714° N
Longitude:	171.1395° W
Quadrangle:	Amukta
CAVW Number:	311200
Nearby towns:	Nikolski 98 mi (158 km) NE Atka 132 mi (212 km) SW Unalaska 211 mi (339 km) NE Adak 237 mi (382 km) SW Anchorage 992 mi (1597 km) NE

DESCRIPTION

From Wood and Kienle (1990) ^[1]: "Chagulak is a small stratovolcano separated from Amukta by ~7 km of ocean, but the two coalesce at depth. Chagulak is unstudied; the only geologic information available is a single chemical analysis. A low-potassium, high-alumina basaltic andesite (51% SiO2, 0.59% K2O) was recovered from the north-northwest shore of the island, but the sample's geologic setting is unknown."

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.

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Chagulak Island description and information