closure of Iapetus Ocean
E87796
The closure of the Iapetus Ocean was a major Paleozoic tectonic event in which ancient continental plates converged, leading to the formation of mountain belts such as the Appalachians and Caledonides.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Iapetus Ocean closure | 1 |
| closure of Iapetus Ocean canonical | 1 |
| closure of the Iapetus Ocean | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T738745 — 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: closure of Iapetus Ocean Context triple: [Paleozoic Era, tectonicActivity, closure of Iapetus Ocean]
-
A.
Scotia Plate
The Scotia Plate is a small tectonic plate in the South Atlantic Ocean, located between the South American and Antarctic Plates and associated with the complex plate boundaries and seismic activity of the Scotia Sea region.
-
B.
breakup of Gondwana
The breakup of Gondwana was a major tectonic event during the Mesozoic era in which the ancient southern supercontinent fragmented into the continents and oceanic plates of the Southern Hemisphere, reshaping global geography and climate.
-
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.
Bornholm Basin
Bornholm Basin is a deep, low-oxygen sub-basin in the southern Baltic Sea that plays a key role in the region’s water exchange and marine ecology.
-
E.
Farallon Plate
The Farallon Plate was a large, ancient oceanic tectonic plate in the Pacific that has mostly subducted beneath the North American Plate, leaving only fragments such as the Juan de Fuca 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: closure of Iapetus Ocean Target entity description: The closure of the Iapetus Ocean was a major Paleozoic tectonic event in which ancient continental plates converged, leading to the formation of mountain belts such as the Appalachians and Caledonides.
-
A.
Scotia Plate
The Scotia Plate is a small tectonic plate in the South Atlantic Ocean, located between the South American and Antarctic Plates and associated with the complex plate boundaries and seismic activity of the Scotia Sea region.
-
B.
breakup of Gondwana
The breakup of Gondwana was a major tectonic event during the Mesozoic era in which the ancient southern supercontinent fragmented into the continents and oceanic plates of the Southern Hemisphere, reshaping global geography and climate.
-
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.
Bornholm Basin
Bornholm Basin is a deep, low-oxygen sub-basin in the southern Baltic Sea that plays a key role in the region’s water exchange and marine ecology.
-
E.
Farallon Plate
The Farallon Plate was a large, ancient oceanic tectonic plate in the Pacific that has mostly subducted beneath the North American Plate, leaving only fragments such as the Juan de Fuca Plate.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
Paleozoic orogeny
ⓘ
ocean closure ⓘ tectonic event ⓘ |
| endTime |
Devonian Period
ⓘ
middle Paleozoic ⓘ |
| followedBy |
assembly of Pangaea
ⓘ
opening of Rheic Ocean ⓘ |
| follows | opening of Iapetus Ocean ⓘ |
| geologicalContext | Wilson cycle ⓘ |
| hasCause |
plate convergence
ⓘ
subduction of oceanic lithosphere ⓘ |
| hasEffect |
collision of Laurentia and Avalonia
ⓘ
collision of Laurentia and Baltica ⓘ continental suturing ⓘ crustal thickening ⓘ deformation of passive margin sediments ⓘ development of major suture zones ⓘ formation of Appalachian Mountains ⓘ formation of Caledonian Mountains ⓘ formation of Euramerica ⓘ formation of Grampian Highlands ⓘ formation of Laurussia ⓘ formation of Scandinavian Caledonides ⓘ granite magmatism ⓘ regional metamorphism ⓘ |
| involves |
Avalonia
ⓘ
Baltica ⓘ Laurentia ⓘ microcontinents ⓘ |
| location |
present-day British Isles
ⓘ
present-day Greenland ⓘ present-day Scandinavia ⓘ present-day eastern North America ⓘ proto-Atlantic region ⓘ |
| occursIn | Paleozoic Era ⓘ |
| partOf |
Acadian orogeny
ⓘ
Appalachian orogeny ⓘ Caledonian orogeny ⓘ Caledonian orogeny ⓘ
surface form:
Grampian orogeny
Taconic orogeny ⓘ assembly of Euramerica ⓘ assembly of Laurussia ⓘ |
| precededBy | rifting of Rodinia margins ⓘ |
| startTime |
Ordovician Period
ⓘ
early Paleozoic ⓘ |
| studiedIn |
metamorphic geology
ⓘ
paleogeography ⓘ structural geology ⓘ tectonics ⓘ |
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: closure of Iapetus Ocean Description of subject: The closure of the Iapetus Ocean was a major Paleozoic tectonic event in which ancient continental plates converged, leading to the formation of mountain belts such as the Appalachians and Caledonides.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Iapetus Ocean closure
this entity surface form:
closure of the Iapetus Ocean