Iapetus Ocean
E223351
The Iapetus Ocean was an ancient Paleozoic ocean that once separated the paleocontinents of Laurentia, Baltica, and Avalonia before closing during the formation of the supercontinent Pangaea.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Iapetus Ocean canonical | 5 |
| Iapetus Ocean opening | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1996543 — 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: Iapetus Ocean Context triple: [Southern Uplands accretionary prism, formedAlong, Iapetus Ocean]
-
A.
Tethys Ocean
The Tethys Ocean was a vast ancient ocean that existed between the supercontinents of Gondwana and Laurasia, playing a key role in Mesozoic plate tectonics and marine evolution.
-
B.
Yoldia Sea
The Yoldia Sea was an early post-glacial brackish water stage of the Baltic basin that existed after the last Ice Age, named after the bivalve Yoldia arctica found in its sediments.
-
C.
Indian Ocean
The Indian Ocean is the world’s third-largest ocean, lying between Africa, Asia, Australia, and the Southern Ocean, and serving as a major route for global trade and maritime activity.
-
D.
Océan
Océan was a prominent French ship of the line that served as a flagship in major naval engagements during the age of sail.
-
E.
World Ocean
The World Ocean is the interconnected system of Earth's major oceanic divisions that together form a single, continuous body of saltwater covering most of the planet's surface.
- 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: Iapetus Ocean Target entity description: The Iapetus Ocean was an ancient Paleozoic ocean that once separated the paleocontinents of Laurentia, Baltica, and Avalonia before closing during the formation of the supercontinent Pangaea.
-
A.
Tethys Ocean
The Tethys Ocean was a vast ancient ocean that existed between the supercontinents of Gondwana and Laurasia, playing a key role in Mesozoic plate tectonics and marine evolution.
-
B.
Yoldia Sea
The Yoldia Sea was an early post-glacial brackish water stage of the Baltic basin that existed after the last Ice Age, named after the bivalve Yoldia arctica found in its sediments.
-
C.
Indian Ocean
The Indian Ocean is the world’s third-largest ocean, lying between Africa, Asia, Australia, and the Southern Ocean, and serving as a major route for global trade and maritime activity.
-
D.
Océan
Océan was a prominent French ship of the line that served as a flagship in major naval engagements during the age of sail.
-
E.
World Ocean
The World Ocean is the interconnected system of Earth's major oceanic divisions that together form a single, continuous body of saltwater covering most of the planet's surface.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
Paleozoic ocean
ⓘ
ancient ocean ⓘ |
| analogOf | modern Atlantic Ocean ⓘ |
| closedBy |
plate convergence
ⓘ
subduction ⓘ |
| closedDuring |
Ordovician–Silurian time
ⓘ
Paleozoic era ⓘ |
| closedIn | Early to Middle Paleozoic ⓘ |
| closureAssociatedWith |
Caledonian orogeny
ⓘ
surface form:
Laurentia–Avalonia collision
Laurentia–Baltica collision ⓘ formation of Pangaea ⓘ |
| closureResultedIn |
Acadian orogeny
ⓘ
Appalachian orogeny ⓘ Caledonian orogeny ⓘ Taconic orogeny ⓘ |
| evidenceIncludes |
deep-marine sedimentary rocks
ⓘ
faunal provinciality in fossils ⓘ ophiolite complexes ⓘ |
| existedDuring |
Cambrian
ⓘ
Late Neoproterozoic ⓘ Ordovician ⓘ Silurian ⓘ |
| formedBefore | Rheic Ocean ⓘ |
| knownFrom |
British Isles
ⓘ
Greenland ⓘ North America ⓘ Scandinavia ⓘ western Europe ⓘ |
| marginPreservedIn |
Appalachian Mountains
ⓘ
Scandinavian Caledonides ⓘ
surface form:
Caledonides of Scandinavia
British Caledonides ⓘ
surface form:
Caledonides of Scotland
Greenland Caledonides ⓘ Irish Caledonides ⓘ |
| namedAfter |
Iapetus
ⓘ
Titan Iapetus from Greek mythology ⓘ |
| openedBetween |
Laurentia and Avalonia
ⓘ
Laurentia and Baltica ⓘ |
| openedBy | continental rifting ⓘ |
| openedIn | Late Neoproterozoic ⓘ |
| paleogeographicSetting | between northern and southern hemisphere continents ⓘ |
| paleontologicalEvidence | distinct trilobite faunas on opposite margins ⓘ |
| predecessorOf | Atlantic Ocean ⓘ |
| relatedTo |
Appalachian Mountains
ⓘ
surface form:
Appalachian mountain belt
Caledonian fault system ⓘ
surface form:
Caledonian mountain belt
|
| riftedFrom |
supercontinent Rodinia
ⓘ
surface form:
Rodinia
|
| separated |
Avalonia
ⓘ
Baltica ⓘ Laurentia ⓘ |
| successorBasinRecordedBy | Rheic Ocean ⓘ |
| tectonicRole | separated early Paleozoic faunal provinces ⓘ |
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: Iapetus Ocean Description of subject: The Iapetus Ocean was an ancient Paleozoic ocean that once separated the paleocontinents of Laurentia, Baltica, and Avalonia before closing during the formation of the supercontinent Pangaea.
Referenced by (6)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Iapetus Ocean opening