Phanerozoic Eon
E11687
The Phanerozoic Eon is the current and most recent major division of Earth's history, marked by abundant fossil evidence and the evolution and diversification of complex life forms, including plants, animals, and eventually humans.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Phanerozoic Eon canonical | 37 |
| Phanerozoic eon | 6 |
| Phanerozoic | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T72254 — 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: Phanerozoic Eon Context triple: [Cretaceous, partOf, Phanerozoic Eon]
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A.
Proterozoic Eon
The Proterozoic Eon is a major division of Precambrian time, spanning from about 2.5 billion to 541 million years ago, marked by the buildup of atmospheric oxygen, the emergence of complex single-celled and early multicellular life, and the assembly of large continental landmasses.
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B.
Mesozoic Era
The Mesozoic Era was a major geological era, often called the "Age of Reptiles," during which dinosaurs dominated the land and the supercontinent Pangaea broke apart into modern continents.
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C.
Jurassic Period
The Jurassic Period was a major division of the Mesozoic Era characterized by warm climates, the dominance and diversification of dinosaurs, and the early evolution of birds.
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D.
Paleogene
The Paleogene is a geologic period that marks the beginning of the Cenozoic Era, characterized by the diversification of mammals and birds following the mass extinction that ended the age of dinosaurs.
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E.
Cretaceous
The Cretaceous was the final period of the Mesozoic Era, marked by high sea levels, diverse dinosaurs, and ending with the mass extinction that wiped them out about 66 million years ago.
- 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: Phanerozoic Eon Target entity description: The Phanerozoic Eon is the current and most recent major division of Earth's history, marked by abundant fossil evidence and the evolution and diversification of complex life forms, including plants, animals, and eventually humans.
-
A.
Proterozoic Eon
The Proterozoic Eon is a major division of Precambrian time, spanning from about 2.5 billion to 541 million years ago, marked by the buildup of atmospheric oxygen, the emergence of complex single-celled and early multicellular life, and the assembly of large continental landmasses.
-
B.
Mesozoic Era
The Mesozoic Era was a major geological era, often called the "Age of Reptiles," during which dinosaurs dominated the land and the supercontinent Pangaea broke apart into modern continents.
-
C.
Jurassic Period
The Jurassic Period was a major division of the Mesozoic Era characterized by warm climates, the dominance and diversification of dinosaurs, and the early evolution of birds.
-
D.
Paleogene
The Paleogene is a geologic period that marks the beginning of the Cenozoic Era, characterized by the diversification of mammals and birds following the mass extinction that ended the age of dinosaurs.
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E.
Cretaceous
The Cretaceous was the final period of the Mesozoic Era, marked by high sea levels, diverse dinosaurs, and ending with the mass extinction that wiped them out about 66 million years ago.
- F. None of above. chosen
Statements (55)
| Predicate | Object |
|---|---|
| instanceOf |
division of geologic time
ⓘ
geologic eon ⓘ |
| beginsWith |
Cambrian explosion
ⓘ
surface form:
Cambrian Explosion
|
| characterizedBy |
abundant fossil record
ⓘ
colonization of land by animals ⓘ colonization of land by plants ⓘ diversification of complex life ⓘ evolution of amphibians ⓘ evolution of animals ⓘ evolution of birds ⓘ evolution of flowering plants ⓘ evolution of humans ⓘ evolution of land plants ⓘ evolution of mammals ⓘ evolution of plants ⓘ evolution of reptiles ⓘ evolution of terrestrial animals ⓘ evolution of vertebrates ⓘ radiation of marine invertebrates ⓘ |
| contains |
Cambrian Period
ⓘ
Carboniferous period ⓘ
surface form:
Carboniferous Period
Cenozoic ⓘ
surface form:
Cenozoic Era
Cretaceous ⓘ
surface form:
Cretaceous Period
Devonian Period ⓘ Jurassic Period ⓘ Mesozoic Era ⓘ Neogene ⓘ
surface form:
Neogene Period
Ordovician Period ⓘ Paleogene ⓘ
surface form:
Paleogene Period
Paleozoic Era ⓘ Permian Period ⓘ Quaternary period ⓘ
surface form:
Quaternary Period
Silurian ⓘ
surface form:
Silurian Period
Triassic ⓘ
surface form:
Triassic Period
|
| earliestEra | Paleozoic Era ⓘ |
| endTime | present ⓘ |
| follows |
Precambrian Supereon
ⓘ
Proterozoic Eon ⓘ |
| hasDuration | about 541 million years ⓘ |
| includesEvent |
Cretaceous–Paleogene mass extinction
ⓘ
Permian–Triassic mass extinction ⓘ appearance of Homo sapiens ⓘ assembly and breakup of supercontinent Pangaea ⓘ breakup of Gondwana ⓘ multiple mass extinctions ⓘ rise of hominins ⓘ |
| isCurrentEon | true ⓘ |
| latestEra |
Cenozoic
ⓘ
surface form:
Cenozoic Era
|
| middleEra | Mesozoic Era ⓘ |
| nameMeaning | visible life ⓘ |
| partOf | geologic time scale ⓘ |
| startTime | about 541 million years ago ⓘ |
| usedIn |
geology
ⓘ
paleontology ⓘ stratigraphy ⓘ |
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: Phanerozoic Eon Description of subject: The Phanerozoic Eon is the current and most recent major division of Earth's history, marked by abundant fossil evidence and the evolution and diversification of complex life forms, including plants, animals, and eventually humans.
Referenced by (44)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Phanerozoic eon
this entity surface form:
Phanerozoic eon
this entity surface form:
Phanerozoic eon
this entity surface form:
Phanerozoic eon
this entity surface form:
Phanerozoic eon
this entity surface form:
Phanerozoic eon
subject surface form:
Laurussia
this entity surface form:
Phanerozoic