Signal Peak Volcano
Updated: Dec 6, 2024 13:26 GMT -
shield volcano 1555 m / 5,102 ft
Washington State (Canada and USA (mainland)), 46.23°N / -121.14°W
Current status: (probably) extinct (0 out of 5)
Washington State (Canada and USA (mainland)), 46.23°N / -121.14°W
Current status: (probably) extinct (0 out of 5)
Signal Peak is the eroded remnant of a small andesitic stratovolcano overlying the southern part of the basaltic shield of the Lincoln Plateau.
Together with still active Mount Adams volcano to the west and the older Simcoe volcanic field of cinder cones to the east, it is part of a larger volcanic province that has been active for perhaps as much as 5 million years in the area.
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Signal Peak volcano eruptions: ca. 1-0.5 million years ago
Latest nearby earthquakes
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Background
Source:Geologic Map of the Mount Adams Quadrangle, Washington. Compiled by M.A.Korosec, Washington Division of Geology and Earth Resources Open File Report 87-5 (1987)
Available for download at: www.osti.gov/bridge/index.jsp
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