Iron Trig cone
Facts
- Seismically Monitored: No
- Color Code: UNASSIGNED
- Alert Level: UNASSIGNED
- Elevation: 1298m (4258ft)
- Latitude: 58.64226
- Longitude: -154.47059
- Smithsonian VNum:
- Pronunciation:
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Nearby Towns:
- Kokhanok 56 mi (90 km) NW
- Pope-Vannoy Landing 63 mi (102 km) NW
- Igiugig 69 mi (112 km) NW
- Port William 69 mi (111 km) SE
- Aleneva 71 mi (115 km) SE
Distance from Anchorage: 238 mi (383 km)
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."Name Origin
"Iron Trig cone" is an informal name given by Hildreth and others (2004).