Proglacial lake

Lake formed by the action of ice

Argentinian proglacial lakes: Lago Viedma (middle), Lago Argentino (left) and Lago San Martin (right). Retreating glaciers are visible at the top. Tarn—a proglacial lake impounded by the terminal moraine of the retreating Schoolroom Glacier in Grand Teton National Park, Wyoming

In geology, a proglacial lake is a lake formed either by the damming action of a moraine during the retreat of a melting glacier, a glacial ice dam, or by meltwater trapped against an ice sheet due to isostatic depression of the crust around the ice.[1] At the end of the last ice age about 10,000 years ago, large proglacial lakes were a widespread feature in the northern hemisphere.

## Moraine-dammed

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Glacial action forming a cirque to become a tarn, upon melting Lake Blåvatnet in Lyngen Alps, Norway located below Lenangsbreene glaciers and surrounded by several moraines formed during Younger Dryas and early Holocene

Further information: Tarn (lake)

The receding glaciers of the tropical Andes have formed a number of proglacial lakes, especially in the Cordillera Blanca of Peru, where 70% of all tropical glaciers are. Several such lakes have formed rapidly during the 20th century. These lakes may burst, creating a hazard for zones below. Many natural dams (usually moraines) containing the lake water have been reinforced with safety dams. Some 34 such dams have been built in the Cordillera Blanca to contain proglacial lakes.

Several proglacial lakes have also formed in recent decades at the end of glaciers on the eastern side of New Zealand's Southern Alps. The most accessible, Lake Tasman, hosts boat trips for tourists.

On a smaller scale, a mountain glacier may excavate a depression forming a cirque, which may contain a mountain lake, called a tarn, upon the melting of the glacial ice.[2]

## Ice-dammed

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The Hubbard Glacier closed off the Russell Fjord from Disenchantment Bay in 2002 to cause the waters behind the glacier to rise 61 feet (19 m) over 10 weeks in a proglacial lake until they broke through.

The movement of a glacier may flow down a valley to a confluence where the other branch carries an unfrozen river. The glacier blocks the river, which backs up into a proglacial lake, which eventually overflows or undermines the ice dam, suddenly releasing the impounded water in a glacial lake outburst flood also known by its Icelandic name a jökulhlaup. Some of the largest glacial floods in North American history were from Lake Agassiz.[3] In modern times, the Hubbard Glacier regularly blocks the mouth of Russell Fjord at 60° north on the coast of Alaska.[4]

A similar event takes place after irregular periods in the Perito Moreno Glacier, located in Patagonia. Roughly every four years the glacier forms an ice dam against the rocky coast, causing the waters of the Lago Argentino to rise. When the water pressure is too high, then the giant bridge collapses in what has become a major tourist attraction. This sequence occurred last on 4 March 2012, the previous having taken place four years before, in July 2008.[5]

About 13,000 years ago in North America, the Cordilleran Ice Sheet crept southward into the Idaho Panhandle, forming a large ice dam that blocked the mouth of the Clark Fork River, creating a massive lake 2,000 feet (600 m) deep and containing more than 500 cubic miles (2,000 km3) of water. Finally this Glacial Lake Missoula burst through the ice dam and exploded downstream, flowing at a rate 10 times the combined flow of all the rivers of the world. Because such ice dams can re-form, these Missoula Floods happened at least 59 times, carving Dry Falls below Grand Coulee.

In some cases, such lakes gradually evaporated during the warming period after the Quaternary ice age. In other cases, such as Glacial Lake Missoula and Glacial Lake Wisconsin in the United States, the sudden rupturing of the supporting dam caused glacial lake outburst floods, the rapid and catastrophic release of dammed water resulting in the formation of gorges and other structures downstream from the former lake. Good examples of these structures can be found in the Channeled Scablands of eastern Washington, an area heavily eroded by the Missoula Floods.[6]

The following table is a partial list of rivers that had glacial ice dams.

Flood/river[7] | Location  | Date  | Peak discharge (106 m3/s)  | Reference

|
|
|
|

Kuray | Altai, Russia | Late Pleistocene | 18  | Baker et al., 1993
Missoula | Northwestern US | Late Pleistocene | 17  | O'Connor and Baker, 1992
Darkhat Lakes | Mongolia | Late Pleistocene | 4  | Rudoy, 1998
Jassater Lakes | Altai, Russia  | Late Pleistocene | 2  | Rudoy, 1998
Yaloman Lakes | Altai, Russia  | Late Pleistocene | 2  | Rudoy, 1998
Ulymon Lakes | Altai, Russia  | Late Pleistocene | 1.9  | Rudoy, 1998
Lake Regina | Canada/US  | Late Pleistocene | 0.8  | Lord and Kehew, 1987
Wabash River | Indiana, US  | Late Pleistocene | 0.27  | Vaughn and Ash, 1983
Lake Agassiz | Canada/US | Late Pleistocene | 0.13  | Matsch, 1983
Porcupine River | Alaska, US  | Late Pleistocene | 0.13  | Thorson, 1989
Russell Fiord | Alaska, US  | 1986  | 0.10  | Mayo, 1989

## Retreating ice sheet

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Stages of proglacial lakes in the region of the current North American Great Lakes

The retreating glaciers of the last ice age, both depressed the terrain with their mass and provided a source of meltwater that was confined against the ice mass. Lake Algonquin is an example of a proglacial lake that existed in east-central North America at the time of the last ice age. Parts of the former lake are now Lake Huron, Georgian Bay, Lake Superior, Lake Michigan and inland portions of northern Michigan.[1] Examples in Great Britain include Lake Lapworth, Lake Harrison and Lake Pickering. Ironbridge Gorge in Shropshire and Hubbard's Hills in Lincolnshire are examples of a glacial overspill channel created when the water of a proglacial lake rose high enough to breach the lowest point in the containing watershed.

## See also

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* Ice jam – Accumulation of ice in a river
* List of prehistoric lakes
* Proglacial lakes of Minnesota – Group of lakes in Minnesota, United States
* Pluvial lake – Landlocked basin (endorheic basin)
* Subglacial lake – Lake under a glacier
* Supraglacial lake – Pond of liquid water on the top of a glacier
* Lacustrine plain

## References

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1. ^ a b Asher-Bolinder, Sigrid (1988). U.S. Geological Survey Bulletin. U.S. Government Printing Office.
2. ^ "Illustrated Glossary of Alpine Glacial Landforms". Archived from the original on 11 August 2007. Retrieved 5 August 2007.
3. ^ ice jam at the Encyclopædia Britannica
4. ^ Reeburgh, William S.; Nebert, D. L. (3 August 1987), The Birth and Death of Russell Lake, Alaska Science Forum, archived from the original on 3 May 2012, retrieved 29 March 2018
5. ^ Ice Break, The Geological Society, 26 March 2004, archived from the original on 17 December 2005
6. ^ http://www.cr.nps.gov/history/online_books/geology/publications/inf/72-2/sec5.htm Archived 13 February 2015 at the Wayback Machine USGS The Channeled Scablands of Eastern Washington
7. ^ O'Connor, J.E., and Costa, J.E., 2004, The world's largest floods, past and present—Their causes and magnitudes: U.S. Geological Survey Circular 1254, 13 p.

## Bibliography

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* Baker, V.R., Benito, G., and Rudoy, A.N., 1993. Paleo-hydrology of late Pleistocene superflooding, Altay Mountains, Siberia: Science, 259, p. 348–350.
* Lord, M.L., and Kehew, A.E., 1987, Sedimentology and paleohydrology of glacial-lake outburst deposits in southeastern Saskatchewan and northwestern North Dakota: Geological Society of America Bulletin v. 99, p. 663–673.
* Matsch, C.L., 1983, River Warren, the southern outlet of Glacial Lake Agassiz, in Teller, J.T., and Lee, Clayton, Glacial Lake Agassiz: Geological Association of Canada Special Paper 26, p. 231–244.
* Mayo, L.R., 1989, Advance of Hubbard Glacier and 1986 outburst of Russell Fiord, Alaska, U.S.A.: Annals of Glaciology, v. 13, p. 189–194.
* O'Connor, J.E., and Baker, V.R., 1992, Magnitudes and implications of peak discharges from Glacial Lake Missoula: Geological Society of America Bulletin, v. 104, p. 267–279.
* Rudoy, A., 1998, Mountain ice-dammed lakes of southern Siberia and their influence on the development and regime of the intracontinental runoff systems of North Asia in the late Pleistocene, in Benito, G., Baker, V.R., and Gregory, K.J., eds., Paleohydrology and Environmental Change: John Wiley and Sons, p. 215–234.
* Thorson, R.M., 1989, Late Quaternary paleofloods along the Porcupine River, Alaska—Implication for regional correlation, in Carter, L.D., Hamilton, T.D., and Galloway, J.P., eds., Late Cenozoic history of the interior basins of Alaska and the Yukon: U.S. Geological Survey Circular 1026, p. 51–54.
* Vaughn, D., and Ash, D.W., 1983, Paleohydrology and geomorphology of selected reaches of the upper Wabash River, Indiana: Geological Society of America Program with Abstracts, v. 15, no. 6, p. 711.

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Related topics|

* Glacial period
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Continental glaciations

General|

* Post-glacial rebound
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Time periods|

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Landforms|

| Erosional|

* Fjord
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* U-shaped valley
* Glacial lake
* Proglacial lake
* Subglacial lake
* Supraglacial lake
* Ribbon lake
* List of prehistoric lakes

|

Depositional|

* Drumlin
* Erratic block
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* Pulju moraine
* Rogen moraine
* Terminal moraine
* Till plain
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| Glacifluvial|

* Diluvium
* Esker
* Giant current ripples
* Kame
* Kame delta
* Kettle hole
* Outwash fan
* Sandur

|

North America|

* Greenland ice sheet
* Canadian Shield
* Cordilleran ice sheet
* Laurentide ice sheet

* Lake Agassiz
* Lake Chicago
* Lake Tight

| Canada|

* Arrowhead Provincial Park, Ontario
* Big Rock (glacial erratic), Alberta
* Cypress Hills (Canada), Saskatchewan
* Eramosa River, Ontario
* Eskers Provincial Park, British Columbia
* Foothills Erratics Train, Alberta
* Lion's Head Provincial Park, Ontario
* Origin of the Oak Ridges Moraine, Ontario
* Ovayok Territorial Park, Nunavut

|

United
States|

* Lake Bonneville, Utah
* Lake Lahontan, Nevada
* Lake Missoula, Montana
* Glacial Lake Wisconsin, Wisconsin

* Chippewa Moraine State Recreation Area, Wisconsin
* Coteau des Prairies, South Dakota
* Devil's Lake State Park, Wisconsin
* Glacial Lakes State Park, Minnesota
* Glacial history of Minnesota
* Horicon Marsh State Wildlife Area, Wisconsin
* Ice Age Floods National Geologic Trail, Idaho, Oregon and Washington
* Ice Age National Scientific Reserve, Wisconsin
* Ice Age Trail, Wisconsin
* Interstate State Park, Minnesota and Wisconsin
* Kelleys Island, Ohio
* Teays River, Ohio
* Kettle Moraine State Forest, Wisconsin
* Mill Bluff State Park, Wisconsin
* Oneida Lake, New York
* Two Creeks Buried Forest State Natural Area, Wisconsin
* Withrow Moraine and Jameson Lake Drumlin Field, Washington
* Yosemite National Park, California

Eurasia|

* Hardangerfjord
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Antarctica|

* Antarctic Glaciation
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Pleistocene proglacial lakes and related seas

Africa|

* Lake Makgadikgadi
* Lake Ptolemy

Antarctica|

* Lake Washburn

Asia|

* Lake Bandung
* Lake Tengger
* Mundafan
* West Siberian Glacial Lake

Europe|

| Baltic Sea|

* Ancylus Lake
* Baltic Ice Lake
* Littorina Sea
* Mastogloia Sea
* Yoldia Sea

|

Russia|

* Lake Komi

Great Britain|

* Lake Harrison
* Lake Lapworth
* Lake Pickering

North America|

| Nelson River drainage|

* Lake Agassiz
* Lake Bassano
* Lake Souris
* Proglacial lakes of Minnesota

|

James Bay drainage|

* Lake Ojibway
* Tyrrell Sea

Great Lakes|

* Champlain Sea
* Lake Admiralty
* Lake Algonquin (Multiple basins)
* Lake Arkona
* Lake Chicago
* Lake Chippewa
* Lake Dana
* Lake Duluth
* Early Lake Erie
* Lake Frontenac
* Lake Houghton (glacial)
* Glacial Lake Iroquois
* Lake Lundy
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* Early Lake Ontario
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* Lake Stanley
* Lake Tonawanda
* Lake Warren
* Lake Wayne
* Lake Whittlesey

Columbia River system|

* Lake Allison
* Glacial Lake Columbia
* Lake Lewis
* Glacial Lake Missoula

Great Basin system|

* Lake Bonneville
* Lake Lahontan

Puget Sound system|

* Glacial Lake Hood
* Lake Nisqually
* Lake Puyallup
* Glacial Lake Russell
* Glacial Lake Sammamish
* Lake Skokomish

Upper Missouri River|

* Lake Chouteau
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* Lake Jordan (Montana)
* Lake McKenzie
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Upper Mississippi drainage|

* Lake Kankakee
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Ohio drainage|

* Lake Monongahela
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Hudson valley|

* Lake Albany
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New England|

* Lake Cape Cod
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California|

* Lake Cahuilla
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Rio Grande rift|

* Lake Alamosa
* Lake Estancia
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Alaska|

* Lake Atna

South America|

* Lake Ballivián
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* Lake Escara
* Inca Huasi
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Summary|

* List of prehistoric lakes

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