Cordilleran Ice Sheet
E311874
The Cordilleran Ice Sheet was a massive Pleistocene ice sheet that covered much of western North America, including present-day British Columbia, Yukon, and parts of the northwestern United States.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Cordilleran Ice Sheet canonical | 7 |
| Cordilleran Ice Complex (in some literature) | 1 |
| Cordilleran Ice Sheet of previous glacial cycles (earlier Pleistocene) | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2909606 — 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.
Target entity: Cordilleran Ice Sheet Context triple: [Wisconsin glaciation, lastMajorAdvanceOf, Cordilleran Ice Sheet]
-
A.
Laurentide Ice Sheet in North America
The Laurentide Ice Sheet in North America was a massive continental glacier that covered much of Canada and parts of the northern United States during the last Ice Age, profoundly shaping the region’s landscapes and climate.
-
B.
Fennoscandian Ice Sheet
The Fennoscandian Ice Sheet was a massive Pleistocene ice sheet that repeatedly covered much of northern Europe, including Scandinavia, Finland, and parts of northern Germany and western Russia.
-
C.
Greenland Ice Sheet (North American sector)
The Greenland Ice Sheet (North American sector) is the vast portion of Greenland’s continental ice mass that extends toward and influences the climate, sea level, and glacial history of the North American region.
-
D.
Patagonian Ice Fields
The Patagonian Ice Fields are vast glacial expanses in southern South America that form the largest temperate ice sheets in the Southern Hemisphere outside Antarctica.
-
E.
Northern Patagonian Ice Field
The Northern Patagonian Ice Field is a vast glacial expanse in southern Chile that forms one of the largest mid-latitude ice masses in the world and feeds numerous outlet glaciers and fjords.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
Target entity: Cordilleran Ice Sheet Target entity description: The Cordilleran Ice Sheet was a massive Pleistocene ice sheet that covered much of western North America, including present-day British Columbia, Yukon, and parts of the northwestern United States.
-
A.
Laurentide Ice Sheet in North America
The Laurentide Ice Sheet in North America was a massive continental glacier that covered much of Canada and parts of the northern United States during the last Ice Age, profoundly shaping the region’s landscapes and climate.
-
B.
Fennoscandian Ice Sheet
The Fennoscandian Ice Sheet was a massive Pleistocene ice sheet that repeatedly covered much of northern Europe, including Scandinavia, Finland, and parts of northern Germany and western Russia.
-
C.
Greenland Ice Sheet (North American sector)
The Greenland Ice Sheet (North American sector) is the vast portion of Greenland’s continental ice mass that extends toward and influences the climate, sea level, and glacial history of the North American region.
-
D.
Patagonian Ice Fields
The Patagonian Ice Fields are vast glacial expanses in southern South America that form the largest temperate ice sheets in the Southern Hemisphere outside Antarctica.
-
E.
Northern Patagonian Ice Field
The Northern Patagonian Ice Field is a vast glacial expanse in southern Chile that forms one of the largest mid-latitude ice masses in the world and feeds numerous outlet glaciers and fjords.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
Pleistocene ice sheet
ⓘ
continental ice sheet ⓘ glacial feature ⓘ |
| beganDeglaciation | late Pleistocene ⓘ |
| causedProcess | isostatic depression of the crust beneath western Canada ⓘ |
| coexistedWith |
Laurentide Ice Sheet in North America
ⓘ
surface form:
Laurentide Ice Sheet
|
| contributedTo | global sea-level lowering during Pleistocene glaciations ⓘ |
| coveredRegion |
Pacific Northwest
ⓘ
surface form:
Pacific Northwest (parts)
present-day Alaska (parts) ⓘ present-day British Columbia ⓘ present-day Idaho (parts) ⓘ present-day Montana (parts) ⓘ present-day Washington State (parts) ⓘ present-day Yukon ⓘ western North America ⓘ |
| evidenceFrom |
glacial striations on bedrock in western North America
ⓘ
raised shorelines and isostatic rebound features ⓘ till deposits in British Columbia and Yukon ⓘ |
| followedBy | postglacial isostatic rebound in deglaciated areas ⓘ |
| formedLandform |
drumlins in parts of British Columbia
ⓘ
eskers in interior British Columbia and Yukon ⓘ fjords of British Columbia coast ⓘ glacial valleys in the Coast Mountains ⓘ glacially dammed lakes ⓘ kettles and kettle lakes in deglaciated areas ⓘ moraines in western Canada ⓘ outwash plains in western North America ⓘ |
| geologicTimePeriod | Pleistocene epoch ⓘ |
| hasAlternativeName |
Cordilleran Ice Sheet
ⓘ
surface form:
Cordilleran Ice Complex (in some literature)
|
| influencedClimate | regional cooling in western North America during glacial maxima ⓘ |
| influencedHydrology |
Columbia River Basin
ⓘ
surface form:
Columbia River system
Fraser River basin ⓘ
surface form:
Fraser River system
Yukon River ⓘ
surface form:
Yukon River headwaters
|
| largelyDisappearedBy | early Holocene ⓘ |
| lastGlacialMaximumApproximate | around 26,000 to 19,000 years ago ⓘ |
| locatedOnContinent | North America ⓘ |
| majorLobe |
Fraser Glaciation ice lobes
ⓘ
Okanogan Lobe ⓘ Puget Lobe ⓘ |
| maximumExtent | from the Pacific coast to the Rocky Mountains in some sectors ⓘ |
| maximumThickness | over 3000 meters in some areas ⓘ |
| namedAfter |
North American Cordillera
ⓘ
surface form:
Cordillera (North American Cordillera)
|
| relatedTo |
Cordilleran Ice Sheet
self-linksurface differs
ⓘ
surface form:
Cordilleran Ice Sheet of previous glacial cycles (earlier Pleistocene)
|
| separatedFrom | Laurentide Ice Sheet by ice-free corridor at some times ⓘ |
| southernLimitApproximate | northwestern United States ⓘ |
| studiedInDiscipline |
Quaternary science
ⓘ
glacial geology ⓘ paleoclimatology ⓘ |
| westernMargin | Pacific Ocean coastline (varied through time) ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Subject: Cordilleran Ice Sheet Description of subject: The Cordilleran Ice Sheet was a massive Pleistocene ice sheet that covered much of western North America, including present-day British Columbia, Yukon, and parts of the northwestern United States.
Referenced by (9)
Full triples — surface form annotated when it differs from this entity's canonical label.