South Atlantic mid-ocean ridge system
E64617
The South Atlantic mid-ocean ridge system is a major underwater mountain chain where tectonic plates diverge in the South Atlantic Ocean, creating new oceanic crust and hosting features such as the Bouvet Triple Junction.
All labels observed (3)
| Label | Occurrences |
|---|---|
| South Atlantic Ocean floor | 1 |
| South Atlantic mid-ocean ridge system canonical | 1 |
| South Atlantic seafloor | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T518961 — 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: South Atlantic mid-ocean ridge system Context triple: [Bouvet Triple Junction region, isPartOf, South Atlantic mid-ocean ridge system]
-
A.
Mid-Atlantic Ridge
The Mid-Atlantic Ridge is a vast underwater mountain range and divergent tectonic plate boundary running down the center of the Atlantic Ocean, where new oceanic crust is formed.
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B.
Southeast Indian Ridge
The Southeast Indian Ridge is a major mid-ocean spreading center in the southern Indian Ocean that forms part of the global system of divergent tectonic plate boundaries.
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C.
Southwest Indian Ridge
The Southwest Indian Ridge is a slow-spreading mid-ocean ridge in the southern Indian Ocean that forms part of the global system of divergent tectonic plate boundaries.
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D.
Pacific-Antarctic Ridge
The Pacific-Antarctic Ridge is a major mid-ocean spreading center in the Southern Ocean where the Pacific and Antarctic tectonic plates diverge, creating new oceanic crust.
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E.
South Scotia Ridge
The South Scotia Ridge is a major submarine mountain chain in the Southern Ocean forming part of the tectonic boundary between the Scotia Plate and the Antarctic Plate.
- 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: South Atlantic mid-ocean ridge system Target entity description: The South Atlantic mid-ocean ridge system is a major underwater mountain chain where tectonic plates diverge in the South Atlantic Ocean, creating new oceanic crust and hosting features such as the Bouvet Triple Junction.
-
A.
Mid-Atlantic Ridge
The Mid-Atlantic Ridge is a vast underwater mountain range and divergent tectonic plate boundary running down the center of the Atlantic Ocean, where new oceanic crust is formed.
-
B.
Southeast Indian Ridge
The Southeast Indian Ridge is a major mid-ocean spreading center in the southern Indian Ocean that forms part of the global system of divergent tectonic plate boundaries.
-
C.
Southwest Indian Ridge
The Southwest Indian Ridge is a slow-spreading mid-ocean ridge in the southern Indian Ocean that forms part of the global system of divergent tectonic plate boundaries.
-
D.
Pacific-Antarctic Ridge
The Pacific-Antarctic Ridge is a major mid-ocean spreading center in the Southern Ocean where the Pacific and Antarctic tectonic plates diverge, creating new oceanic crust.
-
E.
South Scotia Ridge
The South Scotia Ridge is a major submarine mountain chain in the Southern Ocean forming part of the tectonic boundary between the Scotia Plate and the Antarctic Plate.
- F. None of above. chosen
Statements (44)
| Predicate | Object |
|---|---|
| instanceOf |
mid-ocean ridge
ⓘ
undersea mountain range ⓘ |
| agePattern |
progressively older crust away from axis
ⓘ
youngest crust at ridge axis ⓘ |
| associatedWith |
mid-ocean ridge basalt
ⓘ
normal faulting ⓘ shallow-focus earthquakes ⓘ |
| bathymetry | shallower than adjacent abyssal plains ⓘ |
| connectedTo |
American-Antarctic Ridge
ⓘ
surface form:
American–Antarctic Ridge
Southwest Indian Ridge ⓘ |
| controls | magnetic anomaly patterns in South Atlantic seafloor ⓘ |
| creates | new oceanic crust ⓘ |
| crustalThickness | typical oceanic crust thickness ⓘ |
| crustTypeProduced | oceanic crust ⓘ |
| extendsFrom | equatorial Atlantic region ⓘ |
| extendsTo | Southern Ocean ⓘ |
| formedBy | rifting between South America and Africa ⓘ |
| geologicalProcess | seafloor spreading ⓘ |
| hasFeature |
Bouvet Triple Junction region
ⓘ
surface form:
Bouvet Triple Junction
axial rift valley ⓘ fracture zones ⓘ hydrothermal vent fields ⓘ transform faults ⓘ |
| heatFlow | elevated relative to surrounding seafloor ⓘ |
| hosts | chemosynthetic biological communities at vents ⓘ |
| influences |
South Atlantic basin morphology
ⓘ
patterns of South Atlantic magnetic lineations ⓘ |
| isBoundaryBetween | South American Plate and African Plate ⓘ |
| locatedIn |
South Atlantic
ⓘ
surface form:
South Atlantic Ocean
|
| magmatism | basaltic magmatism ⓘ |
| orientation | roughly north–south ⓘ |
| partOf |
Mid-Atlantic Ridge
ⓘ
global mid-ocean ridge system ⓘ |
| sedimentCover | thin near ridge axis ⓘ |
| separates |
African Plate
ⓘ
South American Plate ⓘ |
| spreadingRate | slow-spreading ridge ⓘ |
| studiedIn |
marine geophysics
ⓘ
plate tectonics research ⓘ |
| tectonicSetting | divergent plate boundary ⓘ |
| terminatesNear |
Bouvet Triple Junction region
ⓘ
surface form:
Bouvet Triple Junction
|
| timeOfInitiation | Mesozoic era ⓘ |
| topographicExpression | bathymetric high ⓘ |
| volcanismType | submarine volcanism ⓘ |
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: South Atlantic mid-ocean ridge system Description of subject: The South Atlantic mid-ocean ridge system is a major underwater mountain chain where tectonic plates diverge in the South Atlantic Ocean, creating new oceanic crust and hosting features such as the Bouvet Triple Junction.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
South Atlantic Ocean floor
this entity surface form:
South Atlantic seafloor