Pleistocene Lake Lahontan basin
E134242
The Pleistocene Lake Lahontan basin is an ancient, now mostly dry hydrologic basin in the Great Basin region of Nevada that once held a vast Ice Age lake covering much of northwestern Nevada.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Pleistocene Lake Lahontan basin canonical | 2 |
| Lake Lahontan | 1 |
| Lake Lahontan basin | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T989532 — 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: Pleistocene Lake Lahontan basin Context triple: [Pyramid Lake, locatedInFormerLake, Pleistocene Lake Lahontan basin]
-
A.
Great Basin
The Great Basin is a vast, arid region of interior drainage in the western United States, characterized by its basin-and-range topography, deserts, and salt flats.
-
B.
Mono Basin
Mono Basin is a high-desert watershed in eastern California best known for Mono Lake, its striking tufa formations, and its dramatic Eastern Sierra scenery.
-
C.
Salton Trough
The Salton Trough is a tectonic depression in Southern California and northern Mexico that forms the northernmost extension of the Gulf of California rift zone.
-
D.
Morongo Basin
The Morongo Basin is a high desert region in Southern California’s Mojave Desert, known for its scattered communities, arid landscapes, and proximity to Joshua Tree National Park.
-
E.
Lake Tahoe Basin
The Lake Tahoe Basin is a high-altitude watershed in the Sierra Nevada centered on Lake Tahoe, renowned for its clear alpine lake, surrounding forests, and year-round outdoor recreation.
- 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: Pleistocene Lake Lahontan basin Target entity description: The Pleistocene Lake Lahontan basin is an ancient, now mostly dry hydrologic basin in the Great Basin region of Nevada that once held a vast Ice Age lake covering much of northwestern Nevada.
-
A.
Great Basin
The Great Basin is a vast, arid region of interior drainage in the western United States, characterized by its basin-and-range topography, deserts, and salt flats.
-
B.
Mono Basin
Mono Basin is a high-desert watershed in eastern California best known for Mono Lake, its striking tufa formations, and its dramatic Eastern Sierra scenery.
-
C.
Salton Trough
The Salton Trough is a tectonic depression in Southern California and northern Mexico that forms the northernmost extension of the Gulf of California rift zone.
-
D.
Morongo Basin
The Morongo Basin is a high desert region in Southern California’s Mojave Desert, known for its scattered communities, arid landscapes, and proximity to Joshua Tree National Park.
-
E.
Lake Tahoe Basin
The Lake Tahoe Basin is a high-altitude watershed in the Sierra Nevada centered on Lake Tahoe, renowned for its clear alpine lake, surrounding forests, and year-round outdoor recreation.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
hydrologic basin
ⓘ
paleolake basin ⓘ |
| adjacentTo |
Cascade Range southern extent
ⓘ
Sierra Nevada ⓘ |
| climateContext |
Ice Age conditions
ⓘ
pluvial climate ⓘ |
| contains |
Black Rock Desert
ⓘ
Carson Desert ⓘ Carson Sink ⓘ Honey Lake Valley ⓘ Humboldt River ⓘ
surface form:
Humboldt River terminus
Humboldt Sink ⓘ Lahontan Valley ⓘ Pyramid Lake ⓘ Black Rock Desert ⓘ
surface form:
Smoke Creek Desert
Walker Lake NERFINISHED ⓘ |
| containsFormerLake | Lake Lahontan ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| currentCondition | mostly dry ⓘ |
| drainedBy |
Carson River
ⓘ
Humboldt River ⓘ Truckee River ⓘ Walker River ⓘ |
| formedBy |
Pleistocene glaciation
ⓘ
climate-driven pluvial conditions ⓘ |
| geologicAge | Pleistocene ⓘ |
| geologicFeature |
shoreline benches
ⓘ
tufa formations ⓘ wave-cut terraces ⓘ |
| hasShorelineMarker | Lahontan shoreline ⓘ |
| highestStandElevationApprox | 1330 meters above sea level ⓘ |
| hydrologicStatus | endorheic basin ⓘ |
| locatedIn |
Great Basin
ⓘ
Nevada ⓘ western United States ⓘ |
| maximumLake | Lake Lahontan ⓘ |
| maximumLakeAreaApprox | 22000 square kilometers ⓘ |
| maximumLakeDepthApprox | 270 meters ⓘ |
| namedAfter | Lake Lahontan ⓘ |
| nowContains |
dry lake beds
ⓘ
playas ⓘ saline lakes ⓘ |
| overlaps | modern Lahontan Basin hydrologic region ⓘ |
| partOf | Basin and Range Province ⓘ |
| region | northwestern Nevada ⓘ |
| significance | record of late Quaternary climate change ⓘ |
| usedFor |
Quaternary geology studies
ⓘ
paleoclimate reconstruction ⓘ |
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.
Instruction
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.
Input
Subject: Pleistocene Lake Lahontan basin Description of subject: The Pleistocene Lake Lahontan basin is an ancient, now mostly dry hydrologic basin in the Great Basin region of Nevada that once held a vast Ice Age lake covering much of northwestern Nevada.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Lake Lahontan
this entity surface form:
Lake Lahontan basin