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Ukinrek Maars description and information

UKINREK MAARS LINKS

SAMPLES
LOCATION
FACTS
Official Name: Ukinrek Maars
Type:Two maars
Most Recent Activity:March 30, 1977
Seismically Monitored: Yes
Color Code:UNASSIGNED
Alert Level:UNASSIGNED
Elevation: 299 ft (91 m)
Latitude: 57.8338° N
Longitude:156.5139° W
Quadrangle:Ugashik
CAVW Number:312131
Associated Features:West Maar
East Maar
Nearby towns:Kanatak 25 mi (41 km) SE
Ugashik 39 mi (63 km) SW
Egegik 41 mi (66 km) NW
Pilot Point 43 mi (70 km) SW
Anchorage 329 mi (529 km) NE
DESCRIPTION
From Miller and others (1998) [1]: "Ukinrek Maars are a pair of phreatomagmatic explosion vents that formed on a low (less than 100 m high), 4-km-long, ridge in the Bering Sea Lowland 1.5 km south of Becharof Lake and 12 km northwest of Peulik Volcano. West Maar, elliptical in shape and up to 170 m in diameter and 35 m deep, formed on the northwest end of the ridge [2]. East Maar lies 600 m east of West Maar at a lower elevation. It is circular, up to 300 m in diameter and 70 m deep, and has a 49-m-high central lava dome that is now partly covered by a crater lake. Location of the maars apparently coincides with, and may be controlled by, the intersection of the Bruin Bay fault and regional structures [2] [3]"
REFERENCES CITED
[1]
Catalog of the historically active volcanoes of Alaska, 1998
citation imageMiller, T. P., McGimsey, R. G., Richter, D. H., Riehle, J. R., Nye, C. J., Yount, M. E., and Dumoulin, J. A., 1998, Catalog of the historically active volcanoes of Alaska: U.S. Geological Survey Open-File Report OF 98-0582, 104 p.
Download PDF title page PDF : 52
Download PDF intro and TOC PDF : 268 KB
Download PDF eastern part - Wrangell to Ukinrek Maars PDF : 972 KB
Download PDF central part - Chiginagak to Cleveland PDF : 2,463 KB
Download PDF western part - Carlisle to Kiska PDF : 956 KB
Download PDF references PDF : 43 KB

[2]
Ukinrek Maars, Alaska: I, April 1977 eruption sequence, petrology and tectonic setting, 1980
citation imageKienle, Juergen, Kyle, P. R., Self, Stephen, Motyka, R. J., and Lorenz, Volker, 1980, Ukinrek Maars, Alaska: I, April 1977 eruption sequence, petrology and tectonic setting: Journal of Volcanology and Geothermal Research, v. 7, n. 1, p. 11-37.

[3]
Generalized geologic map of the Ugashik, Bristol Bay, and part of the Karluk quadrangles, Alaska, 1983
Detterman, R. L., Case, J. E., Wilson, F. H., Yount, M. E., and Allaway, W. H. Jr., 1983, Generalized geologic map of the Ugashik, Bristol Bay, and part of the Karluk quadrangles, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF 1539-A, unpaged, 1 sheet, scale 1:250,000.

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