Steens Mountain volcanic field
E672555
Steens Mountain volcanic field is a large volcanic region in southeastern Oregon known for its extensive basalt flows and dramatic fault-block mountain landscapes.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Steens Mountain volcanic field canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7536218 — 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: Steens Mountain volcanic field Context triple: [Volcanoes of Oregon, hasNotableMember, Steens Mountain volcanic field]
-
A.
Taos Plateau volcanic field
The Taos Plateau volcanic field is an extensive volcanic region in northern New Mexico characterized by numerous basaltic lava flows, cinder cones, and volcanic features that form part of the southern Rocky Mountains landscape.
-
B.
Jemez volcanic field
The Jemez volcanic field is a large volcanic region in northern New Mexico known for its extensive volcanic history, geothermal activity, and prominent features such as the Valles Caldera.
-
C.
Monts Dore volcanic field
The Monts Dore volcanic field is a large, ancient volcanic massif in France’s Massif Central, characterized by eroded stratovolcanoes, domes, and glacially carved terrain.
-
D.
Wrangell volcanic field
The Wrangell volcanic field is a large volcanic region in eastern Alaska characterized by massive shield and stratovolcanoes, extensive lava flows, and long-lived volcanic activity associated with the Wrangell Mountains.
-
E.
Navajo Volcanic Field
The Navajo Volcanic Field is a geologic region on the Colorado Plateau characterized by numerous volcanic necks, diatremes, and other erosional remnants of ancient volcanic activity.
- 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: Steens Mountain volcanic field Target entity description: Steens Mountain volcanic field is a large volcanic region in southeastern Oregon known for its extensive basalt flows and dramatic fault-block mountain landscapes.
-
A.
Taos Plateau volcanic field
The Taos Plateau volcanic field is an extensive volcanic region in northern New Mexico characterized by numerous basaltic lava flows, cinder cones, and volcanic features that form part of the southern Rocky Mountains landscape.
-
B.
Jemez volcanic field
The Jemez volcanic field is a large volcanic region in northern New Mexico known for its extensive volcanic history, geothermal activity, and prominent features such as the Valles Caldera.
-
C.
Monts Dore volcanic field
The Monts Dore volcanic field is a large, ancient volcanic massif in France’s Massif Central, characterized by eroded stratovolcanoes, domes, and glacially carved terrain.
-
D.
Wrangell volcanic field
The Wrangell volcanic field is a large volcanic region in eastern Alaska characterized by massive shield and stratovolcanoes, extensive lava flows, and long-lived volcanic activity associated with the Wrangell Mountains.
-
E.
Navajo Volcanic Field
The Navajo Volcanic Field is a geologic region on the Colorado Plateau characterized by numerous volcanic necks, diatremes, and other erosional remnants of ancient volcanic activity.
- F. None of above. chosen
Statements (42)
| Predicate | Object |
|---|---|
| instanceOf |
large igneous province
ⓘ
volcanic field ⓘ |
| age | Miocene ⓘ |
| associatedWith |
North American plate motion over a mantle plume
ⓘ
Yellowstone hotspot track NERFINISHED ⓘ |
| boundedBy | normal faults ⓘ |
| contains |
columnar jointed basalt
ⓘ
multiple stacked lava flow units ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| erosionalExpression | steep escarpments ⓘ |
| eruptionEndAge | about 15.5 million years ago ⓘ |
| eruptionStartAge | about 16.7 million years ago ⓘ |
| eruptionStyle | effusive ⓘ |
| exposedAt |
Alvord Desert margin
NERFINISHED
ⓘ
Steens Mountain NERFINISHED ⓘ |
| forms | thick basalt sequences ⓘ |
| geologicalFeature | flood basalt province ⓘ |
| geologicSignificance |
key reference section for Miocene flood basalts in the Pacific Northwest
ⓘ
records early phase of Columbia River Basalt volcanism ⓘ |
| landformType | fault-block mountain landscape ⓘ |
| lavaFlowDirection | primarily northward and westward ⓘ |
| locatedIn |
Basin and Range Province
NERFINISHED
ⓘ
Oregon ⓘ southeastern Oregon NERFINISHED ⓘ |
| magmaticSource | mantle-derived basaltic magmas ⓘ |
| maximumBasaltThickness | more than 1000 meters ⓘ |
| namedAfter | Steens Mountain NERFINISHED ⓘ |
| notableFor |
extensive basalt flows
ⓘ
well-exposed lava flow stratigraphy ⓘ |
| overlies | older volcanic and sedimentary rocks ⓘ |
| partOf | Columbia River Basalt Group NERFINISHED ⓘ |
| proximateTo |
Alvord Desert
NERFINISHED
ⓘ
Steens Mountain Wilderness NERFINISHED ⓘ |
| region | Harney County, Oregon NERFINISHED ⓘ |
| researchUse |
study of flood basalt volcanism
ⓘ
study of mantle plume–lithosphere interaction ⓘ study of paleomagnetism ⓘ |
| rockType |
basaltic andesite
ⓘ
tholeiitic basalt ⓘ |
| tectonicSetting | Basin and Range extensional regime ⓘ |
| underlies | younger Basin and Range sediments ⓘ |
| volcanismType | fissure eruptions ⓘ |
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: Steens Mountain volcanic field Description of subject: Steens Mountain volcanic field is a large volcanic region in southeastern Oregon known for its extensive basalt flows and dramatic fault-block mountain landscapes.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.