Cocos–Nazca spreading center
E54044
The Cocos–Nazca spreading center is a mid-ocean ridge in the eastern Pacific where tectonic divergence forms and separates the Cocos and Nazca plates.
All labels observed (6)
How this entity was disambiguated
This entity first appeared as the object of triple T401941 — 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: Cocos–Nazca spreading center Context triple: [Cocos Plate, createdAt, Cocos–Nazca spreading center]
-
A.
Peru–Chile Trench region
The Peru–Chile Trench region is a highly active subduction-zone area off the west coast of South America, known for its deep ocean trench, frequent earthquakes, and major role in Andean mountain building.
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B.
Juan de Fuca Ridge
Juan de Fuca Ridge is an underwater volcanic spreading center in the northeastern Pacific Ocean where new oceanic crust forms as tectonic plates diverge.
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C.
Gorda Plate
The Gorda Plate is a small tectonic plate off the coast of northern California that forms part of the complex plate boundary system between the Pacific and North American Plates.
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D.
East Pacific Rise
The East Pacific Rise is a major mid-oceanic ridge and seafloor spreading center in the eastern Pacific Ocean, where tectonic plates diverge and new oceanic crust is formed.
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E.
Gulf of California rift zone
The Gulf of California rift zone is an active tectonic region where continental crust is being stretched and thinned, linking the San Andreas Fault system to seafloor spreading centers in the eastern Pacific.
- 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: Cocos–Nazca spreading center Target entity description: The Cocos–Nazca spreading center is a mid-ocean ridge in the eastern Pacific where tectonic divergence forms and separates the Cocos and Nazca plates.
-
A.
Peru–Chile Trench region
The Peru–Chile Trench region is a highly active subduction-zone area off the west coast of South America, known for its deep ocean trench, frequent earthquakes, and major role in Andean mountain building.
-
B.
Juan de Fuca Ridge
Juan de Fuca Ridge is an underwater volcanic spreading center in the northeastern Pacific Ocean where new oceanic crust forms as tectonic plates diverge.
-
C.
Gorda Plate
The Gorda Plate is a small tectonic plate off the coast of northern California that forms part of the complex plate boundary system between the Pacific and North American Plates.
-
D.
East Pacific Rise
The East Pacific Rise is a major mid-oceanic ridge and seafloor spreading center in the eastern Pacific Ocean, where tectonic plates diverge and new oceanic crust is formed.
-
E.
Gulf of California rift zone
The Gulf of California rift zone is an active tectonic region where continental crust is being stretched and thinned, linking the San Andreas Fault system to seafloor spreading centers in the eastern Pacific.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
mid-ocean ridge
ⓘ
spreading center ⓘ |
| associatedWith |
magmatic accretion at plate boundary
ⓘ
seafloor spreading ⓘ |
| boundedBy | transform faults ⓘ |
| crustAgePattern |
progressively older crust away from axis
ⓘ
youngest crust at ridge axis ⓘ |
| crustFormationMechanism | partial melting of upper mantle ⓘ |
| crustTypeProduced | mafic oceanic crust ⓘ |
| forms | oceanic crust ⓘ |
| geodynamicContext | spreading of oceanic plates in eastern Pacific ⓘ |
| geologicalAgeContext | Cenozoic ⓘ |
| geologicalProcess | tectonic divergence ⓘ |
| hasFeature |
axial rift valley
ⓘ
hydrothermal circulation ⓘ normal faulting ⓘ volcanic activity ⓘ |
| hasMorphology | linear volcanic ridge ⓘ |
| heatFlow | elevated ⓘ |
| influences | bathymetry of eastern Pacific seafloor ⓘ |
| isAssociatedWith | mantle upwelling beneath ridge axis ⓘ |
| isBoundaryType | constructive plate margin ⓘ |
| isCharacterizedBy |
high geothermal gradient
ⓘ
high seismicity relative to surrounding seafloor ⓘ thin lithosphere at ridge axis ⓘ |
| isPartOf | global mid-ocean ridge system ⓘ |
| isSiteOf | mid-ocean ridge basalt eruptions ⓘ |
| isSubmarine | true ⓘ |
| lithosphereType | oceanic lithosphere ⓘ |
| locatedIn | eastern Pacific Ocean ⓘ |
| movementType | spreading apart ⓘ |
| namedAfter |
Cocos Plate
ⓘ
Nazca Plate ⓘ |
| ocean | Pacific Ocean ⓘ |
| partOf |
Pacific mid-ocean ridge system
ⓘ
linked to:
East Pacific Rise
|
| plateBoundaryBetween |
Cocos Plate
ⓘ
Nazca Plate ⓘ |
| separates |
Cocos Plate
ⓘ
Nazca Plate ⓘ |
| spreadingEnvironment | oceanic-oceanic divergent boundary ⓘ |
| tectonicPlateRegion |
Cocos Plate
ⓘ
Nazca Plate ⓘ |
| tectonicRole | accommodates relative motion between Cocos and Nazca plates ⓘ |
| tectonicSetting | divergent plate boundary ⓘ |
| topographicExpression | submarine ridge ⓘ |
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: Cocos–Nazca spreading center Description of subject: The Cocos–Nazca spreading center is a mid-ocean ridge in the eastern Pacific where tectonic divergence forms and separates the Cocos and Nazca plates.
Referenced by (8)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Cocos–Nazca spreading center
linked to: Cocos–Nazca spreading center
linked to: Cocos–Nazca spreading center
linked to: Cocos–Nazca spreading center
linked to: Cocos–Nazca spreading center