What type of volcano is Mount Fisher?
andesite stratovolcano
Fisher is an andesite stratovolcano capped by a caldera. The volcanic center has a volume of about 300 cubic km and a diameter of about 21 km. The stratovolcano has been deeply eroded and glaciated. The caldera is 11 by 18 km and contains two lakes.
What tectonic plate is Mt Spurr on?
Capps, S. R., 1929, The Mount Spurr region, Alaska: U.S. Geological Survey Bulletin 0810-C, p. 141-172, 2 plates, scale 1:250,000….Mount Spurr description and information.
| Official Name: | Mount Spurr |
|---|---|
| Most Recent Activity: | September 16, 1992 |
| Seismically Monitored: | Yes |
| Color Code: | GREEN |
| Alert Level: | NORMAL |
When did Mount Spurr last erupt?
On 27 June, 1992, the Crater Peak vent on the south side of Mt. Spurr awoke from 39 years of dormancy and burst into sub-plinian eruption after 10 months of elevated seismicity.
How many times has Mount Spurr erupted?
Spurr’s two historical eruptions, from Crater Peak in 1953 and 1992, deposited ash on the city of Anchorage. Crater Peak has a summit crater that is itself slightly breached along the south rim; the north wall of the crater exposes the truncated remains of an older dome or lava lake.
Why are they called shield volcanoes?
A shield volcano is a type of volcano named for its low profile, resembling a warrior’s shield lying on the ground. It is formed by the eruption of highly fluid (low viscosity) lava, which travels farther and forms thinner flows than the more viscous lava erupted from a stratovolcano.
What is fissure eruption in geography?
A fissure vent, also known as a volcanic fissure, eruption fissure or simply a fissure, is a linear volcanic vent through which lava erupts, usually without any explosive activity. The vent is often a few metres wide and may be many kilometres long.
Where is the Iliamna volcano?
southwest Alaska
Mount Iliamna (Dena’ina: Ch’naqał’in; Sugpiaq: Puyulek) is a glacier-covered stratovolcano in the largely volcanic Aleutian Range in southwest Alaska….
| Mount Iliamna | |
|---|---|
| Location | Lake Clark National Park and Preserve |
| Country | United States |
| State | Alaska |
| Region | Kenai Peninsula Borough |
Is Mount Spurr still active?
Several ice-carved post-caldera domes lie in the caldera. Present Mt. Spurr is the highest of the post-caldera….
| Mount Spurr | |
|---|---|
| Mountain type | Stratovolcano |
| Volcanic arc/belt | Aleutian Arc |
| Last eruption | June to September 1992 |
| Climbing |
What type of volcano is Mount Saint Helens?
Mount St. Helens is a stratovolcano, a steep-sided volcano located in the Pacific Northwest region of the United States in the state of Washington.
What are 3 shield volcanoes?
Examples of shield volcanoes are Kilauea and Mauna Loa (and their Hawaiian friends), Fernandina (and its Galápagos friends), Karthala, Erta Ale, Tolbachik, Masaya, and many others.
How does fissure type volcanoes form?
Fissure eruptions occur when magma flows up through cracks in the ground and leaks out onto the surface. These often occur where plate movement has caused large fractures in the earth’s crust, and may also spring up around the base of a volcano with a central vent.