Lake Missoula basin

E311875

geological formation glacial lake basin paleolake basin

Lake Missoula basin is the prehistoric glacial lake depression in the Pacific Northwest that once held vast volumes of meltwater responsible for the cataclysmic Missoula Floods.

Try in SPARQL Jump to: Surface forms Disambiguation Statements Elicitation Referenced by

All labels observed (2)

Label	Occurrences
Glacial Lake Missoula	8
Lake Missoula basin canonical	1

How this entity was disambiguated

This entity first appeared as the object of triple T2909639 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: Lake Missoula basin
Context triple: [Wisconsin glaciation, createdFeature, Lake Missoula basin]

A. Lake Agassiz basin
The Lake Agassiz basin is the vast prehistoric drainage area in central North America that once held glacial Lake Agassiz, one of the largest proglacial lakes in Earth’s history.
B. South Basin
South Basin is a prominent glacial cirque on Maine’s Mount Katahdin, characterized by steep rock walls and a bowl-shaped valley formed by ancient glacial erosion.
C. Fish Lake Valley
Fish Lake Valley is a remote, sparsely populated desert valley known for its geothermal features and agricultural use, located in western Nevada near the California border.
D. Canada Basin
The Canada Basin is a deep, remote submarine basin in the Arctic Ocean, located north of Alaska and Canada, known for its extreme depths, perennial sea ice cover, and importance to polar oceanographic research.
E. Palisade Basin
Palisade Basin is a high-elevation alpine basin in California’s Sierra Nevada, known for its rugged granite peaks, glacial lakes, and remote backcountry setting.
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: Lake Missoula basin
Target entity description: Lake Missoula basin is the prehistoric glacial lake depression in the Pacific Northwest that once held vast volumes of meltwater responsible for the cataclysmic Missoula Floods.

A. Lake Agassiz basin
The Lake Agassiz basin is the vast prehistoric drainage area in central North America that once held glacial Lake Agassiz, one of the largest proglacial lakes in Earth’s history.
B. South Basin
South Basin is a prominent glacial cirque on Maine’s Mount Katahdin, characterized by steep rock walls and a bowl-shaped valley formed by ancient glacial erosion.
C. Fish Lake Valley
Fish Lake Valley is a remote, sparsely populated desert valley known for its geothermal features and agricultural use, located in western Nevada near the California border.
D. Canada Basin
The Canada Basin is a deep, remote submarine basin in the Arctic Ocean, located north of Alaska and Canada, known for its extreme depths, perennial sea ice cover, and importance to polar oceanographic research.
E. Palisade Basin
Palisade Basin is a high-elevation alpine basin in California’s Sierra Nevada, known for its rugged granite peaks, glacial lakes, and remote backcountry setting.
F. None of above. chosen

Statements (45)

Predicate	Object
instanceOf	geological formation ⓘ glacial lake basin ⓘ paleolake basin ⓘ
associatedWith	Missoula Floods ⓘ linked to: Missoula floods
containsFormerly	Glacial Lake Missoula ⓘ linked to: Lake Missoula basin
country	United States of America ⓘ
drainedVia	Clark Fork River ⓘ
erodedBy	Missoula Floods ⓘ linked to: Missoula floods catastrophic outburst floods ⓘ
evidenceIncludes	giant current ripples downstream ⓘ glacial lake sediments ⓘ strandlines on valley walls ⓘ
floodEventsCount	dozens of major outburst floods (approximate) ⓘ
formedBy	Cordilleran Ice Sheet ⓘ Pleistocene glaciation ⓘ
geologicalAge	Late Pleistocene ⓘ
held	meltwater from the Cordilleran Ice Sheet ⓘ
importance	key example of glacial outburst flood basin ⓘ
influencedFormationOf	Channeled Scablands ⓘ
influencedGeomorphologyOf	Columbia River Gorge ⓘ linked to: Columbia River Gorge National Scenic Area Willamette Valley ⓘ eastern Washington ⓘ
locatedIn	North America ⓘ Pacific Northwest ⓘ United States ⓘ linked to: United States of America western Montana ⓘ
maximumLakeDepth	over 2,000 feet ⓘ over 600 meters ⓘ
maximumWaterVolume	approximately 2,100 cubic kilometers ⓘ approximately 500 cubic miles ⓘ
namedAfter	city of Missoula ⓘ
near	city of Missoula, Montana ⓘ linked to: Missoula
notableFor	holding vast volumes of meltwater ⓘ producing cataclysmic jökulhlaup-style floods ⓘ
partOf	Clark Fork River valley system ⓘ linked to: Clark Fork River Columbia River drainage basin (paleogeographic context) ⓘ linked to: Columbia River Basin
region	northern Rocky Mountains ⓘ
relatedTo	Channeled Scablands ⓘ Cordilleran Ice Sheet ⓘ Glacial Lake Missoula ⓘ linked to: Lake Missoula basin Pleistocene megafloods ⓘ
responsibleFor	Missoula Floods ⓘ linked to: Missoula floods
studiedInDiscipline	Quaternary geology ⓘ geomorphology ⓘ
timePeriod	Quaternary ⓘ

How these facts were elicited