| Isanotski Peaks | |
|---|---|
 Peak of Isanotski Peaks | |
| Highest point | |
| Elevation | 8,106 ft (2,471 m) |
| Prominence | 5,831 ft (1,777 m) |
| Listing | |
| Coordinates | 54°46′07″N163°43′46″W / 54.76861°N 163.72944°W /54.76861; -163.72944 |
| Geography | |
  Isanotski Peaks Alaska | |
| Location | Unimak Island,Alaska, U.S. |
| Parent range | Aleutian Range |
| Geology | |
| Formed by | Subduction zonevolcanism |
| Mountain type | Stratovolcano |
| Volcanic arc | Aleutian Arc |
| Last eruption | Unknown |
Isanotski Peaks orIsanotski Volcano, known locally as "Ragged Jack", is a multipeaked mountain onUnimak Island, the easternmostAleutian Island inAlaska, United States. It is an old, highly dissectedstratovolcano, lying about 10 miles (16 km) east ofShishaldin Volcano, the highest peak in the Aleutian Islands. Its height is also often given as 8,025 feet (2446 m).
In contrast to many of the younger, symmetrical volcanoes of the region, Isanotski is topped by multiple rugged pinnacles. This makes climbing or skiing the peak much more challenging than Shishaldin, for example.
While eruptions from 1825 and the 1840s have been attributed to Isanotski, geologists were only able to find evidence ofHolocene eruptions on Shishaldin, not on Isanotski. Because of this, the actual date of Isanotski's last eruption is unknown.[1]
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