United States · Stratovolcano
Mount Roundtop
Roundtop
- Type
- Stratovolcano
- Elevation
- 1871m
- Last eruption
- -7600
- Type
- Stratovolcano
- Country
- United States
- Region
- North America / Aleutian Ridge Volcanic Arc
- Elevation
- 1871m
- Coordinates
- 54.800, -163.589
- Last eruption
- -7600
- Tectonic setting
- Subduction zone / Continental crust (> 25 km)
- Landform
- Composite
- Major rock type
- Rhyolite
Geological summary
The flat-topped, glacier-covered Roundtop is the easternmost and lowest of an E-W-trending line of volcanoes on eastern Unimak Island, 13 km SW of the village of False Pass.
Excerpt from the Global Volcanism Program, Smithsonian Institution · Read the full summary on GVP →
From Wikipedia
Roundtop Mountain is a stratovolcano located on the Aleutian island of Unimak in the U.S. state of Alaska. Its last eruption was sometime between 9,100 and 10,000 years ago. This geographic feature was first called "Dome" in 1897 by Lieutenant Commander J. F. Moser, of the U.S. Navy. Its name was reported as "Round Top" by the United States Coast and Geodetic Survey in 1902. Isanotski Peaks, the nearest higher neighbor, is positioned 5.9 mi (9 km) to the west-southwest.
Wikipedia · CC BY-SA · Read full article →
Eruption history
1 recordedGlossaryRecord summary
- Confirmed eruptions
- 1
- Uncertain eruptions
- 0
- Span of confirmed record
- 7600 BCE (±500 yrs) – 7600 BCE
- Largest confirmed eruption
- VEI 5 (7600 BCE)
- Confirmed eruptions since 1900
- 0
Detailed timeline
- 7600 BCE (±500 yrs)VEI 5Geological estimate7600 BCE – end unknown
Nearby volcanoes
External links
⚠ For reference only. Not for emergency response.