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time, and was active from about 680,000 years ago to about 43,000 years ago. The remnant summit crater consists of hydrothermally altered rock. It is the only member of the Katmai volcanic group that is no longer active.
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Mount Martin stands partly on
Alagogshak's deeply eroded edifice, about 3 kilometres (1.9 mi) northeast of the Alagogshak vent. Alagogshak was last active in
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351:"Alagogshak Volcano: A Pleistocene Andesite-Dacite Stratovolcano in Katmai National Park"
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Alagogshak
Volcano: A Pleistocene Andesite-Dacite Stratovolcano in Katmai National Park
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Hildreth, Wes; Fierstein, Judy; Lanphere, Marvin A.; Siems, David F. (1997).
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289:List of volcanoes in the United States of America
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278:Map showing volcanoes of Alaska Peninsula.
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457:Katmai National Park and Preserve
252:Katmai National Park and Preserve
145:Katmai National Park and Preserve
408:at the Alaska Volcano Observtory
381:"Katmai National Park Volcanoes"
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337:PeakVisor, Alagogshak Volcano
256:Valley of Ten Thousand Smokes
46:5,495 ft (1,675 m)
462:Pleistocene stratovolcanoes
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358:Alaska Volcano Observatory
316:Alaska Volcano Observatory
339:, Retrieved Jan. 6, 2023.
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30:Alagogshak summit in 1997
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360:. U.S. Geological Survey
318:. U.S. Geological Survey
56:377 ft (115 m)
383:. National Park Service
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84:58.1573°N 155.39839°W
250:, United States, in
437:Volcanoes of Alaska
432:Mountains of Alaska
89:58.1573; -155.39839
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131:Location in Alaska
36:Highest point
379:Fierstein, Judy.
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385:. Retrieved
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312:"Alagogshak"
260:Mount Martin
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222:Aleutian Arc
157:Parent range
387:15 February
364:15 February
322:15 February
268:Pleistocene
193:Pleistocene
188:Age of rock
149:Alaska, USA
87: /
75:155°23′54″W
62:Coordinates
421:Categories
406:Alagogshak
295:References
240:Alagogshak
125:Alagogshak
72:58°09′26″N
52:Prominence
19:Alagogshak
211:Volcanic
100:Geography
42:Elevation
283:See also
264:Holocene
170:Topo map
141:Location
233:Unknown
182:Geology
354:(PDF)
242:is a
389:2019
366:2019
324:2019
217:belt
175:USGS
213:arc
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