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Random pictures

Signal Peak volcano

shield volcano 1555 m / 5,102 ft
Washington, USA (mainland exept Alaska), 46.23°N / -121.14°W
Current status: (probably) extinct (0 out of 5) | Reports
Signal Peak volcano books
Typical eruption style: ? effusive lava flows
Signal Peak volcano eruptions: ca. 1-0.5 million years ago
TimeMag. / DepthDistanceLocation
Thu, 1 Nov
Thu, 1 Nov 02:21 UTCM 1.2 / 2.9 km5 km- 21km ESE of Packwood, Washington
Fri, 28 Sep
Fri, 28 Sep 21:45 UTCM 1.1 / 5.4 km21 km- 33km SW of Ahtanum, Washington
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.

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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