Glacier Peak

Glacier Peak is the most remote of the five dormant/active volcanoes in Washington. It has produced some of the largest and most explosive eruptions in the state. There are at least 12 glaciers on the sides of the volcano. Most of the loose pyroclastic deposits have been eroded by these glaciers.
Volcano Status: Dormant.
Age/Last Eruption: Oldest eruptions on record began 13,100 years ago. Two pyroclastic layers, deposited about 11,250 years ago, extend 500-600 miles (800-1,000 km) to the east. The last eruption occurred about 200-300 years ago.
Peak Elevation: 10,539 feet (3,213 meters).
Volcano Type/Deposits: Stratovolcano. Composed predominantly of andesite lava, dacite lava, and pyroclastic deposits.

Print No. A01NW-17-1.