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Iron Trig cone description and information

IRON TRIG CONE LINKS

SAMPLES
LOCATION
FACTS
Type:Scoria cone and lava-flow apron
Most Recent Activity:-86050
Seismically Monitored: No
Elevation: 4259 ft (1298 m)
Latitude: 58.64226° N
Longitude:154.47059° W
Quadrangle:Mt Katmai
CAVW Number:
Pronunciation: Sound file
Nearby towns:Kokhanok 56 mi (90 km) NW
Pope-Vannoy Landing 63 mi (102 km) NW
Port William 69 mi (111 km) SE
Igiugig 69 mi (112 km) NW
Anchorage 238 mi (383 km) NE
DESCRIPTION
This feature is part of the Savonoski River Cluster of volcanoes, as defined by Hildreth and others (2004) [1]. From Hildreth and others (2004) [1]: "Iron Trig Cone (Peak 4260) is a mafic scoria cone (53-54% SiO2) atop the basement divide between the Savonoski and Kamishak Rivers, 50 km NE of Mount Katmai and 25 km north of Mount Denison. The glaciated cone, 800 m across with 250 m relief, consists of stratified scoria, agglutinate, and thin lava sheets that are cut by a small intrusion exposed on the west face. Ejecta and lava contain phenocrysts of plagioclase, olivine, clinopyroxene, and magnetite. A lava-flow apron (88 +/- 27 ka) descends the WSW flank to an elevation 300 m lower than the cone, condensing into a single flow 20 m thick at its eroded terminus, 2 km from the cone."
REFERENCES CITED
[1]
Rear-arc vs. arc-front volcanoes in the Katmai reach of the Alaska Peninsula: a critical apprasial of across-arc compositional variation, 2004
citation imageHildreth, Wes, Fierstein, Judy, Siems, D. F., Budahn, J. R., and Ruiz, Joaquin, 2004, Rear-arc vs. arc-front volcanoes in the Katmai reach of the Alaska Peninsula: a critical apprasial of across-arc compositional variation: Contributions to Mineralogy and Petrology, v. 147, n. 3, p. 243-275.
http://dx.doi.org/10.1007/s00410-004-0558-2

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