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Jumbo Dome description and information

Jumbo Dome Links

Description

Data

Location

Facts

Official Name:	Jumbo Dome
Type:	A large cylindrical plug of hornblende andesite
Most Recent Activity:
Seismically Monitored:	No
Elevation:	4491 ft (1369 m)
Latitude:	63.975° N
Longitude:	148.69444° W
Quadrangle:	Healy
CAVW Number:
Pronunciation:	Sound file
Nearby towns:	Ferry 9 mi (14 km) NW Denali Borough 12 mi (19 km) SW Healy 12 mi (19 km) SW McKinley Park 18 mi (29 km) SW Anchorage 194 mi (312 km) SW

Description

From Albanese (1980): "Jumbo Dome is a large cylindrical plug of hornblende andesite 1.6 km long, 1.3 km wide, and 500 m high which intrudes the Devonian Keevy Peak Formation basement and overlying Tertiary Suntrana Formation." Ar/Ar dating by Athey and others (2006) yields an age for Jumbo Dome of 1.026 +/- 0.057 Ma.

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Page modified: September 24, 2013 14:10
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