Mount Spurr Mount Spurr Mountain Information

Mount Spurr Mount Spurr Mountain Information

Mount Spurr

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Mount Spurr
Mount Spurr.jpg

Mount Spurr from the south
Highest point
Elevation 11,070 ft (3,374 m)  [2]
style=”padding: 0.2em 0.4em 0.2em 0em; vertical-align:text-bottom; white-space: nowrap;”> Prominence 585 m (1,919 ft)  [1]
Parent peak Mount Torbert [1]
Coordinates 61°17′59″N 152°15′05″W / 61.29972°N 152.25139°W / 61.29972; -152.25139 Coordinates : 61°17′59″N 152°15′05″W / 61.29972°N 152.25139°W / 61.29972; -152.25139 [3]
Geography
Mount Spurr is located in Alaska

Mount Spurr
Mount Spurr
Kenai Peninsula Borough, Alaska , United States
Parent range Tordrillo Mountains , Alaska Range
Topo map USGS Tyonek B-7
Geology
Age of rock < 10,000 years
Mountain type Stratovolcano
Volcanic arc / belt Aleutian Arc
Last eruption June to September 1992 [2]
Climbing
First ascent 1960 [1]

Mount Spurr is a stratovolcano in the Aleutian Arc of Alaska , named after United States Geological Survey geologist and explorer Josiah Edward Spurr , who led an expedition to the area in 1898. The Alaska Volcano Observatory (AVO) currently rates Mount Spurr as Level of Concern Color Code Green. [2] The mountain is known aboriginally by the Dena’ina Athabascan name K’idazq’eni, literally ‘that which is burning inside’. [4]

Mount Spurr, the highest volcano of the Aleutian arc, is a large lava dome constructed at the center of a roughly 5 km-wide horseshoe-shaped caldera that is open to the south. The volcano lies 80.87 miles west of Anchorage and NE of Chakachamna Lake. The caldera was formed by a late-Pleistocene or early Holocene debris avalanche and associated pyroclastic flows that destroyed an ancestral Spurr volcano. The debris avalanche traveled more than 15.5 miles to the SE, and the resulting deposit contains blocks as large as 100m in diameter. Several ice-carved post-caldera domes lie in the caldera. Present Mt. Spurr is the highest of the post-caldera. This regrown summit peak of Spurr experienced a heating event in 2004 which created a small crater lake. By 2008, the summit crater had cooled enough to have begun to have accumulated significant amounts of snow again. The youngest post-caldera dome, Crater Peak (2309m, 7575 ft), formed at the breached southern end of the caldera about 3.2 km south of Spurr, has been the source of about 40 identified Holocene tephra layers. Spurr’s two historical eruptions, from Crater Peak in 1953 and 1992, deposited ash on the city of Anchorage. Crater Peak has a summit crater that is itself slightly breached along the south rim; the north wall of the crater exposes the truncated remains of an older dome or lava lake. Before the 1992 eruption, a small crater lake occupied the bottom of Crater Peak’s crater.

As with other Alaskan volcanoes, the proximity of Spurr to major trans-Pacific aviation routes means that an eruption of this volcano can significantly disrupt air travel. Volcanic ash can cause jet engines to fail. [5]

Recent activity[ edit ]

On July 26, 2004, the AVO raised the “Color Concern Code” at Spurr from green to yellow due to an increasing number of earthquakes . Earthquakes beneath a volcano may indicate the movement of magma preceding a volcanic eruption , but the earthquakes might also die out without an eruption. In the first week of August 2004, the AVO reported the presence of a collapse pit, filled with water forming a new crater lake , in the ice and snow cover on the summit. This is a third volcano occurred in this pit may have been caused by an increase in heat flow through the summit lava dome.

On May 3, 2005, a debris flow was observed in webcam images, as well as by a nearby pilot. A subsequent overflight revealed that much of the sitting pond within the melt hole had drained away, a notable depth. [6]

References[ edit ]

  1. ^ a b c “Mount Spurr” . Bivouac.com. Retrieved 2008-09-20.

  2. ^ a b c
    “Mount Spurr” . Alaska Volcano Observatory. Retrieved 2018-03-06.
  3. ^ “Mount Spurr” . Geographic Names Information System . United States Geological Survey . Retrieved 2018-03-06.
  4. ^ Kari, James. 2007. Dena’ina Topical Dictionary. Fairbanks: Alaska Native Language Center.
  5. ^ Boeing Company. “Volcanic Ash Avoidance” . Retrieved 2013-06-13.
  6. ^ “Spurr” . Global Volcanism Program . Smithsonian Institution . Retrieved 2018-03-06.

External links[ edit ]

Wikimedia Commons has media related to Mount Spurr .
  • Volcano World article about Spurr
  • Mount Spurr Webcam

Retrieved from ” https://en.wikipedia.org/w/index.php?title=Mount_Spurr&oldid=859424107 ”
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  • Volcanoes of Kenai Peninsula Borough, Alaska
  • Mountains of Kenai Peninsula Borough, Alaska
  • Mountains of Alaska
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  • 20th-century volcanic events
  • Calderas of Alaska
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      You are here: Home > Volcano Information > spurr

      Mount Spurr description and information

      SPURR LINKS
      Description Images Maps Bibliography Reported Activity Current Activity


      Jumbo Dome Hayes

      SAMPLES
      Map Display List Display

      Webicorders
      SPBG SPCR SPBG

      Webcams
      SpurrCKT
      LOCATION

      FACTS
      Official Name: Mount Spurr
      Type:Stratovolcano and explosion caldera
      Most Recent Activity: September 16, 1992
      Seismically Monitored: Yes
      Color Code:GREEN
      Alert Level:NORMAL
      Elevation: 11070 ft (3374 m)
      Latitude: 61.2989° N
      Longitude:152.2539° W
      Quadrangle:Tyonek
      CAVW Number:313040
      Pronunciation: Sound file
      Associated Features:Crater Peak
      Nearby towns:Beluga 37 mi (60 km) SE
      Tyonek 40 mi (65 km) SE
      Nikiski 51 mi (81 km) SE
      Susitna 55 mi (89 km) NE
      Anchorage 78 mi (126 km) SE

      DESCRIPTION

      From Miller and others (1998) [1] : “Mount Spurr is a Quaternary stratovolcano located near the northeastern end of the Aleutian volcanic arc. It is the easternmost historically active volcano in the Aleutian arc and is the highest of several snow- and ice-covered peaks that appear to define a large, dissected stratovolcano [2] .

      “Capps (1929) [3] suggested that a summit caldera, largely buried by ice, is associated with Mount Spurr. Later, Juhle and Coulter (1955) [2] disagreed with the caldera interpretation suggesting that the peaks around Mount Spurr only coincidentally resemble the rim of a large subsidence structure. Most recent studies, however, suggest that ancestral Mt. Spurr, constructed during late Pleistocene time [4] , was partially destroyed by a major Bezymianny-type eruption possibly as late as early Holocene time [5] [6] . The eruption produced a voluminous volcanic debris avalanche and subsequent pyroclastic flows that resulted in the formation of a 5- to 6-km-diameter explosion caldera. The volcanic debris avalanche contains blocks as much as 100 m in diameter and traveled a minimum of 25 km. The overlying pyroclastic flows are partially welded and are composed chiefly of high silica andesite. Present Mt. Spurr is the highest of several post-caldera, centrally located, ice-carved cones or domes.

      “The youngest volcanic feature at Mount Spurr is a satellitic cone, Crater Peak, located in the breach in the caldera about 3.2 km south of Mount Spurr. Crater Peak has a summit crater that is itself slightly breached along the south rim; the north wall of the crater exposes the truncated remains of an older dome or lava lake. Crater Peak has been the source of all Late Holocene eruptive activity at Mt. Spurr [5] . Before the 1992 eruption, a small crater lake occupied the bottom of the crater.”

      REFERENCES CITED
      [1]

      Catalog of the historically active volcanoes of Alaska , 1998
      citation imageMiller, T. P., McGimsey, R. G., Richter, D. H., Riehle, J. R., Nye, C. J., Yount, M. E., and Dumoulin, J. A., 1998, Catalog of the historically active volcanoes of Alaska: U.S. Geological Survey Open-File Report 98-0582, 104 p.
      Download PDF title page PDF : 52
      Download PDF intro and TOC PDF : 268 KB
      Download PDF eastern part – Wrangell to Ukinrek Maars PDF : 972 KB
      Download PDF central part – Chiginagak to Cleveland PDF : 2,463 KB
      Download PDF western part – Carlisle to Kiska PDF : 956 KB
      Download PDF references PDF : 43 KB

      [2]

      The Mt. Spurr eruption, July 9, 1953 , 1955
      citation imageJuhle, R. W., and Coulter, H. W., 1955, The Mt. Spurr eruption, July 9, 1953: Eos, v. 36, n. 2, p. 199-202.

      [3]

      The Mount Spurr region, Alaska , 1929
      citation imageCapps, S. R., 1929, The Mount Spurr region, Alaska: U.S. Geological Survey Bulletin 0810-C, p. 141-172, 2 plates, scale 1:250,000.
      Download PDF full-text PDF : 1.6 MB
      Download PDF plate 3 PDF : 324 KB

      [4]

      Geochronology of eruptive events at Mt. Spurr, Alaska , 1986
      Turner, D. L., and Nye, C. J., 1986, Geochronology of eruptive events at Mt. Spurr, Alaska: in Turner, D. L. and Wescott, E. M., (eds.), Geothermal energy resource investigations at Mt. Spurr, Alaska, University of Alaska Fairbanks Geophysical Institute Report UAG-R 308, p. 20-27, 1 plate, scale 1:2,860.

      [5]

      A reconnaissance of the major Holocene tephra deposits in the upper Cook Inlet region, Alaska , 1985
      citation imageRiehle, J. R., 1985, A reconnaissance of the major Holocene tephra deposits in the upper Cook Inlet region, Alaska: Journal of Volcanology and Geothermal Research, v. 26, n. 1-2, p. 37-74.

      [6]

      Petrology, geochemistry, and age of the Spurr volcanic complex, eastern Aleutian arc , 1990
      citation imageNye, C. J., and Turner, D. L., 1990, Petrology, geochemistry, and age of the Spurr volcanic complex, eastern Aleutian arc: Bulletin of Volcanology, v. 52, n. 3, p. 205-226.

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