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Mount Baker

Coordinates: 48°46′38″N 121°48′48″W / 48.77722°N 121.81333°W / 48.77722; -121.81333
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Mount Baker
Map
Highest point
Prominence2,686 m (8,812 ft) Edit this on Wikidata
Isolation211.66 km (131.52 mi) Edit this on Wikidata
The mountain in 2001

Mount Baker (elevation 10,778 feet (3,285 m)) is an active[4] glaciated andesitic stratovolcano [3] in the Cascade Volcanic Arc and the North Cascades of Washington State in the United States about 31 miles (50 km) [8] due east of the city of Bellingham, Whatcom County, making it the northernmost volcano in the Cascade Range but not the northernmost of the Cascade Volcanic Arc, which extends north into the Coast Mountains. Additionally, it is the fourth highest mountain in Washington State and the sixth highest in the Cascade Range.[9][3] Located in the Mount Baker Wilderness, it is also easily visible from much of Greater Victoria, Greater Vancouver and the Fraser Valley just across the Canadian border to the north and west. It is also visible from the communities of Mission and Abbotsford, both about 28 miles (45 km) east of Vancouver, as well as from some locations in Everett and even Seattle to the southwest.

The mountain is often locally referred to as Koma Kulshan or simply Kulshan (Lummi, qwúʔmə, "white sentinel", i.e. "mountain", and kwəlshéːn, "puncture wound", i.e. "crater"),[10][11][12] though it is also less frequently known by the Indian names "Quck Sam-ik" (Nooksack: kw’eq sámit, "white mountain"),[13] "Kobah" (Skagit: qwúbəʔ, "white sentinel", i.e. "mountain"), and "Tukullum" or "Nahcullum" (in the language of the unidentified "Koma tribe").[14] Mount Rainier, called "Tacoma", effectively means "larger than Koma (Kulshan)".[15]

Spanish explorer Gonzalo Lopez de Haro mapped it in 1790 as the Gran Montaña del Carmelo, "Great Mount Carmel".[16] However, the explorer George Vancouver renamed the mountain for 3rd Lieutenant Joseph Baker of HMS Discovery, who saw it on April 30, 1792.[17]

After Mount Rainier, Baker is the most heavily glaciated of the Cascade volcanoes: the volume of snow and ice on Mount Baker (0.43 cubic miles, 1.8 cubic kilometers) is greater than that of all the other Cascades volcanoes (except Rainier) combined. It is also one of the snowiest places in the world; in 1999, Mount Baker Ski Area, located on a subsidiary peak, set the world record for snowfall in a single season—1,140 inches (95 feet or 2,896 cm).[18]

History

Although indigenous natives were first to see the mountain, the Spanish were the first to record Mount Baker's existence. In 1790, Manuel Quimper of the Spanish Navy set sail from Nootka, a temporary settlement on Vancouver Island, with orders to explore the newly discovered Strait of Juan de Fuca. Accompanying Quimper was first-pilot Gonzalo Lopez de Haro who drew detailed charts during the six-week expedition. Although Quimper's written journal of the voyage makes no reference to the mountain, one of Haro's manuscript charts includes a sketch of a prominent peak in the vicinity of Mount Baker.[19]

The British explorer George Vancouver left England a year later in 1791. His mission was to survey the northwest coast of America. Vancouver and his crew reached the Pacific Northwest coast in 1792. While anchored in Dungeness Bay on the south shore of the Strait of Juan de Fuca, third lieutenant Joseph Baker made an observation of Mount Baker which Vancouver recorded in his journal:

About this time a very high conspicuous craggy mountain ... presented itself, towering above the clouds: as low down as they allowed it to be visible it was covered with snow; and south of it, was a long ridge of very rugged snowy mountains, much less elevated, which seemed to stretch to a considerable distance ... the high distant land formed, as already observed, like detached islands, amongst which the lofty mountain, discovered in the afternoon by the third lieutenant, and in compliment to him called by me Mount Baker, rose a very conspicuous object ... apparently at a very remote distance.[19]

Six years later the official narrative of this voyage was published, including the first printed reference to the mountain.[19]

By the mid-1850s, Mount Baker had become a well-known feature on the horizon to the various explorers and fur traders traveling in the Puget Sound region. Isaac I. Stevens, the first governor of Washington Territory, wrote about Mount Baker in 1853:

Mount Baker ... is one of the loftiest and most conspicuous peaks of the northern Cascade range; it is nearly as high as Mount Rainier, and like that mountain, its snow-covered pyramid has the form of a sugar-loaf. It is visible from all the water and islands ... [in Puget Sound] and from the whole southeastern part of the Gulf of Georgia, and likewise from the eastern division of the Strait of Juan de Fuca. It is for this region a natural and important landmark.[19]

First ascent

Edmund Thomas Coleman, an Englishman residing in Victoria, British Columbia, Canada and veteran of the Alps, made the first attempt to ascend the mountain in 1866 choosing a route via the Skagit River, but was forced to turn back when local Native Americans refused him passage.[16]

For his second attempt later that same year Coleman recruited Edward Eldridge, John Bennett and John Tennant. After approaching via the North Fork of the Nooksack River, the party navigated what is now known as Coleman Glacier and ascended to within several hundred feet of the summit before turning back in the face of an "overhanging cornice of ice" and threatening weather.[16]

Coleman returned to the mountain two years later. At 4:00 p.m. on August 17, 1868, Coleman, Eldridge, Tennant and two new companions (David Ogilvy and Thomas Stratton) gained the summit.[16]

Geology

Panorama from the northwest

The present-day cone of Mount Baker is relatively young, perhaps less than 30,000 years old, but it sits atop a similar older volcanic cone called Black Buttes Volcano which was active between 500,000 and 300,000 years ago.[20] Much of Mount Baker's earlier geological record was eroded away during the last ice age (which culminated 15,000–20,000 years ago), by thick ice sheets that filled the valleys and covered much of the region. In the last 14,000 years, the area around the mountain has been largely ice free, but the mountain itself remains heavily mantled with snow and ice.[21]

Isolated ridges of lava and hydrothermally altered rock, especially in the area of Sherman Crater, are exposed between glaciers on the upper flanks of the volcano: the lower flanks are steep and heavily vegetated. The volcano rests on a foundation of non-volcanic rocks in a region that is largely non-volcanic in origin.[21]

Park and Rainbow Glaciers on the northeast flank

Deposits which record the last 14,000 years at Mount Baker indicate that Mount Baker has not had highly explosive eruptions like those of other volcanoes in the Cascade Volcanic Arc, such as Mount St. Helens, Mount Meager or Glacier Peak, nor has it erupted frequently. During this period only four episodes of magmatic eruptive activity can be definitively recognized. Magmatic eruptions have produced tephra, pyroclastic flows, and lava flows from summit vents and from the Schriebers Meadow cinder cone. However, the most destructive and most frequent events at Mount Baker have been lahars or debris flows and debris avalanches, many, if not most, of which were not related to magmatic activity but may have been induced by steam emissions, earthquakes, heavy rainfall, or in some other way.[21]

Eruptive History

Early history

Research in the 1990s shows Mount Baker to be the youngest of several volcanic centers in the area and one of the youngest volcanoes in the Cascade Range. Volcanic activity in the Mount Baker area began more than one million years ago, but many of the earliest lava and tephra deposits have been removed by glacial erosion. The pale-colored rocks northeast of the modern volcano mark the site of ancient Kulshan Caldera that collapsed after an enormous ash eruption one million years ago. Subsequently, eruptions in the Mount Baker area have produced cones and lava flows of andesite, the rock that makes up much of other Cascade Range volcanoes like Rainier, Adams, and Hood. From about 900,000 years ago to the present, numerous andesitic volcanic centers in the area have come and gone, eroded by glaciers. The largest is the Black Buttes edifice, active between 400,000 and 300,000 years ago and formerly bigger than today's Mount Baker.[22][4]

Modern Mount Baker

Sampling fumarole gas inside the mountain in 1981

Modern Mount Baker formed during and since the last ice age, which ended about 15,000 years ago. Lava flows from the summit vent erupted between 30,000 and 10,000 years ago and, during the final stages of edifice construction, blocky pyroclastic flows poured down most of the volcano's drainages. An eruption 6,600 years ago produced a blanket of ash that extended more than 20 miles (32 km) to the northeast. This eruption probably occurred from the presently ice-filled summit crater. Subsequently, sulfurous gases have found two pathways to the surface – Dorr Fumaroles, northeast of the summit, and Sherman Crater, south of the summit. Both are sites of bedrock alteration, converting lavas to weak, white-to-yellow material rich in clays, silica, and sulfur-bearing minerals. At Sherman Crater, collapses of this weakened rock created lahars in 1843 and as recently as the 1970s.[22][4]

6,600 years ago

6,600 years ago, a series of discrete events culminated with the largest tephra-producing eruption in post-glacial time at Mount Baker. First, the largest collapse in the history of the volcano occurred from the Roman Wall and transformed into a lahar that was over 300 feet (91 m) deep in the upper reaches of the Middle Fork of the Nooksack River. It was at least 25 feet (7.6 m) deep 30 miles (48 km) downstream from the volcano and probably reached Bellingham Bay. Next, a huge hydrovolcanic explosion occurred near the site of the present day Sherman Crater, triggering a second collapse of the flank just east of the Roman Wall. That collapse also became a lahar that mainly followed the course of the first one for at least 20 miles (32 km), but also spilled into tributaries of the Baker River. Finally, an eruption cloud deposited several inches of ash as far as 20 miles (32 km) downwind to the northeast.[22][4]

Historical activity

Historical activity at Mount Baker includes several explosions during the mid-19th century, which were witnessed from the Bellingham area,[21] and numerous small-volume debris avalanches since the late 1950s.[23] A possible eruption was seen in June of 1792 during the Spanish expedition of Dionisio Alcalá Galiano and Cayetano Valdés. Their report read, in part:

During the night [while anchored in Bellingham Bay] we constantly saw light to the south and east of the mountain of Carmelo [Baker] and even at times some bursts of flame, signs which left no doubt that there are volcanoes with strong eruptions in those mountains.[24]

Mount Baker as seen from the Gulf of Georgia. San Juan and Orcas Islands in distance at right.

In 1843, explorers reported a widespread layer of newly fallen rock fragments "like a snowfall" and the forest "on fire for miles around". Rivers south of the volcano were clogged with ash, and Native Americans reported that many salmon were killed. A short time later, two collapses of the east side of Sherman Crater produced two lahars, the first and larger of which flowed into the natural Baker Lake, rising its level at least 10 feet (3.0 m). The location of the 19th-century lake is now covered by waters of the modern dam-impounded Baker Lake. Similar but lower level hydrovolcanic activity at Sherman Crater continued intermittently for several decades afterwards.[22][4]

In 1860 an eruption of Mount Baker, passengers travelling by steamer from New Westminster to Victoria, on the 26th November, reported that volcanic peak was in a state of active eruption, "puffing out large volumes of smoke, which upon breaking, rolled down the snow-covered sides of the mountain, forming a pleasing efiect of light and shade."[25]

The Easton Glacier (on the south flank) in 2003. The superimposed black line indicates its extent in 1985.

In 1891, about 20,000,000 cubic yards (15,000,000 m3) of rock fell producing a lahar that traveled more than 6 miles (9.7 km) and covered 1-square-mile (2.6 km2).[22][4]

In early March, 1975, a sudden and dramatic increase in fumarolic activity and snow melt in the Sherman Crater area caused concern that an eruption might be imminent.[21] Heat flow increased more than tenfold.[22][4] Additional monitoring equipment was installed and several geophysical surveys were conducted to try to detect the movement of magma.[21] The increased thermal activity prompted public officials and Puget Power to temporarily close public access to the popular Baker Lake recreation area and to lower the reservoir's water level by 10 meters. Significant avalanches of debris from the Sherman Crater area could have swept directly into the reservoir, triggering a disastrous wave that would have caused loss of life and damage to the reservoir.[26] However, few anomalies other than the increased heat flow were recorded during the geophysical surveys, nor were any other precursory activities observed to indicate that magma was moving up into the volcano.[21] Several small lahars formed from material ejected onto the surrounding glaciers and acidic water was discharged into Baker Lake for many months.[22][4]

The activity gradually declined over the next two years but stabilized at a higher level than before 1975.[22][4] The increased level of fumarolic activity has continued at Mount Baker from 1975 to the present, but there are no other changes that suggest that magma movement is involved.[21]

Glaciers and hydrology

A map of the glaciers on Mount Baker

There are 10 main glaciers on the mountain. The Coleman Glacier is the largest with a surface area of 5.2 km².[27] The other large glaciers, with areas greater than 2.5 km², are Roosevelt Glacier, Mazama Glacier, Park Glacier, Boulder Glacier, Easton Glacier and Deming Glacier.[28][27] All retreated during the first half of the century, advanced from 1950–1975 and have been retreating increasingly rapidly since 1980.[29][30][31]

Mount Baker is drained on the north by streams flowing into the North Fork Nooksack River, on the west by the Middle Fork Nooksack River, and on the southeast and east by tributaries of the Baker River.[23]

U.S. Navy

Two ammunition ships of the United States Navy (traditionally named for volcanoes) have been named after the mountain. The first was USS Mount Baker (AE-4), in commission from 1941 to 1947 and again from 1951 to 1969.[32] In 1972, the Navy commissioned USS Mount Baker (AE-34). It was decommissioned in 1996 and placed in service with the Military Sealift Command as USNS Mount Baker (T-AE-34).[33]

See also

References

  1. ^ "Mt. Baker Wilderness Area". Mt. Baker-Snoqualmie National Forest. United States Forest Service. 2007-10-26. Retrieved 2008-05-10.
  2. ^ a b Hildreth, Wes (2007). Quaternary Magmatism in the Cascades- Geologic Perspectives: U.S. Geological Survey Professional Paper 1744. Reston, Virginia: United States Department of the Interior United States Geological Survey. p. 9. ISBN 1-4113-1945-1.
  3. ^ a b c Wood, Charles A. (1990). Volcanoes of North America. Cambridge University Press. pp. 155–156. ISBN 0-521-43811-X. OCLC 27910629. {{cite book}}: Unknown parameter |coauthors= ignored (|author= suggested) (help)
  4. ^ a b c d e f g h i j Scott, Kevin M. (2005-05-25). Mount Baker-Living with an Active Volcano: U.S. Geological Survey Fact Sheet 059-00. United States Geological Survey. {{cite book}}: Unknown parameter |coauthors= ignored (|author= suggested) (help)
  5. ^ Template:VNUM Template:Accessdate
  6. ^ Oakley, Janet (2005-11-14). "Coleman Party reaches the summit of Mount Baker on August 17, 1868". The Online Encyclopedia of Washington State History. HistoryLink.org. Retrieved 2008-05-09.
  7. ^ Coleman, Edmund T. (November 1869). "The First Ascent of Mount Baker". Harper’s New Monthly Magazine. 39. Retrieved 2008-05-09.
  8. ^ Topinka, Lyn (15 April 2008). "Mount Baker". United States Geological Survey. Retrieved 2008-05-08.
  9. ^ Smoot, Jeff (2000). "The 100 Highest Mountains in Washington". Cascade Alpine Guide. Retrieved 2008-05-19.
  10. ^ http://www.bellingham.org/PDF/MtBaker_Byway.pdf
  11. ^ http://resources.wcog.org/projects/cot_plan.pdf
  12. ^ http://www.whatcomwatch.org/old_issues/v8i2.html
  13. ^ The Seattle Times
  14. ^ http://books.google.com/books?id=3ek5uvZaNGIC&printsec=frontcover
  15. ^ http://books.google.com/books?id=Z8-3KVL03UYC&printsec=frontcover
  16. ^ a b c d "A Brief History of Mt. Baker". Mt. Baker-Snoqualmie National Forest — Climbing Mt. Baker. United States Forest Service. 2007-10-26. Retrieved 2008-05-11.
  17. ^ Meany, Edmond Stephen (1907). "Chapter VI: Proceed up the Straits — Anchor under New Dungeness — Remarks on the Coast of New Albion — Arrive in Port Discovery — Transactions there — Boat Excursion — Quit Port Discovery — Astronomical and Nautical Observations". Vancouver's discovery of Puget Sound: Portraits and biographies of the men honored in the naming of geographic features of northwestern America. pp. 81–82. {{cite book}}: |access-date= requires |url= (help); External link in |chapterurl= (help); Unknown parameter |chapterurl= ignored (|chapter-url= suggested) (help)
  18. ^ "NOAA: Mt. Baker snowfall record sticks", USA Today, August 1, 1999{{citation}}: CS1 maint: date and year (link)
  19. ^ a b c d Luxenberg, G.A. (1986). "Early Impressions: Euro-American Explorations and Surveys". North Cascades Historic Resource Study. {{cite book}}: External link in |chapterurl= (help); Unknown parameter |chapterurl= ignored (|chapter-url= suggested) (help) (public domain source)
  20. ^ Tabor, Rowland W. (1999). Geology of the North Cascades: A Mountain Mosaic. The Mountaineers Books. p. 40. ISBN 0898866235. OCLC 40559713.
  21. ^ a b c d e f g h Gardner, C.A. (1995). Potential Volcanic Hazards from Future Activity of Mount Baker, Washington: U.S. Geological Survey Open-File Report 95-498. United States Geological Survey. {{cite book}}: Unknown parameter |coauthors= ignored (|author= suggested) (help)
  22. ^ a b c d e f g h Topinka, Lyn (2008-04-25). "Mount Baker, Washington, Brief Eruptive History". United States Geological Survey Cascades Volcano Observatory. Retrieved 2008-05-11.
  23. ^ a b Hyde (1978). "PostGlacial Volcanic Deposits at Mount Baker, Washington, and Potential Hazards from Future Eruptions". USGS Prof. Paper. 1022-C: C1. {{cite journal}}: Unknown parameter |coauthors= ignored (|author= suggested) (help)
  24. ^ Kendrick, John (1990). The Voyage of Sutil and Mexicana, 1792: The last Spanish exploration of the Northwest Coast of America. Spokane, Washington: The Arthur H. Clark Company. p. 108. ISBN 0-87062-203-X.
  25. ^ British Columbia: From the Earliest Times to the Present, Alexander Begg
  26. ^ Brantley, Steven R. (1999-01-04). "Volcanoes of the United States, Online Version 1.1". USGS General Interest Publications. United States Geological Survey. Retrieved 2008-05-11.
  27. ^ a b Post, A. (1971). "Inventory of glaciers in the North Cascades, Washington". USGS Prof. Paper. 705-A: A1–A26. {{cite journal}}: Unknown parameter |coauthors= ignored (|author= suggested) (help)
  28. ^ Topinka, Lyn (2002-07-09). "Mount Baker Glaciers and Glaciation". United States Geological Survey. Retrieved 2008-05-09. {{cite web}}: Text "work" ignored (help)[dead link]
  29. ^ Pelto, Mauri S. "North Cascade Glacier Climate Project". Retrieved 2008-05-08.
  30. ^ Pelto, M. (2001). "Terminus behavior and response time of North Cascade glaciers, Washington, U.S.A". Journal of Glaciology. 47 (158): 496–506. doi:10.3189/172756501781832098. {{cite journal}}: Cite has empty unknown parameter: |month= (help); Unknown parameter |coauthors= ignored (|author= suggested) (help)
  31. ^ Beckey, Fred (1995). Cascade Alpine Guide: Climbing and High Routes : Rainy Pass to Fraser River. Mountaineers Books; 2nd edition. ISBN 0-89886-423-2. OCLC 14692076 33204115 50137587. {{cite book}}: Check |oclc= value (help)
  32. ^ "Mount Baker". Dictionary of American Naval Fighting Ships. Department of the Navy -- Naval Historical Center. Retrieved 2008-05-19.
  33. ^ "MSC Ship Inventory — USNS Mount Baker". Military Sealift Command — Ship Inventory. Department of the Navy - Military Sealift Command. 2002-03-26. Retrieved 2008-05-19.