Active and Inactive Volcanoes:

By: Lindsey Paulsen

Mt. Kiska: Active• Location: Latitude: 52.1031°

N Longitude: 177.6035° E• 4003 ft (1220 m)• Last known eruption: June 1,

1990

Kiska Volcano is a stratovolcano, 8.5 by 6.4 km in diameter at its base and 1221 meters high. It is a cinder cone volcano, and it’s southern part has been glacially eroded.

Mt. Iliamna: Active-

• Location: Elevation: 10016 ft (3053 m) Latitude:

60.0319° N• Height: 10016 ft (3053 m)• Last known eruption: March

1, 1953

Mt. Iliamna is very broad and deep. It is a roughly cone-shaped mountain at the north end of a 5-km-long ridge. The volcano is a typical composite stratovolcano composed of interbedded andesite lava flows and pyroclastic rocks.

Carlisle: Inactive- • Location- Latitude:52.8906° NLongitude:170.0576° W

• Height- 5315 ft (1620 m)• Last known eruption-

November 16, 1987

Carlisle consists of a single symmetric cone, 1524 m high and 6.5 km in diameter at sea level. The western margin of the island consists of a small plateau at an elevation of 50 meters, showing the possibility that the Carlisle stratovolcano is constructed on an emergent marine terrace.

Kanaga Volcano: Active-• Location: Latitude:

51.9242° NLongitude: 177.1623° W

• Height- 4288 ft (1307 m)• Last known eruption:

June 11, 1996

It is a symmetric composite cone 1307 m high and 4.8 km in diameter at sea level, built of interbedded basaltic and andesitic lava flows, scoria layers, and pyroclastic rocks. It has a round crater, of 200 meters across and 60 meters deep. It contains deposits of vent agglomerate and several active fumaroles.

Kasatochi Volcano: Inactive-

• Location: Latitude: 52.1693° NLongitude: 175.5113° W

• Height: 1030 ft (314 m)• Last known eruption: August 7, 2008

Kasatochi Island represents the emergent summit of a submarine volcano. It has a dissected cone with a central lake-filled crater about 0.75 km in diameter.

Glossary:• Stratovolcano- A tall, conical volcano made up of many layers

built up of hardened lava, tephra, pumice, and volcanic ash.• Cinder cone volcano- A steep conical hill made up of volcanic

fragments the collect around and downwind from a volcanic vent.

• Interbedding- Occurs when beds of rock lie between or alternate with beds of a different material.

• Andesite- An extrusive igneous and volcanic rock of intermediate composition.

• Pyroclastic- Clastic rocks made of volcanic materials.