Paleozoic Era
E14994
The Paleozoic Era was an ancient geologic time interval, spanning roughly 541 to 252 million years ago, marked by the emergence and diversification of complex life in the seas and on land and the assembly of major continental landmasses.
All labels observed (8)
| Label | Occurrences |
|---|---|
| Paleozoic Era canonical | 37 |
| Paleozoic | 21 |
| Paleozoic era | 9 |
| Palaeozoic | 3 |
| Devonian | 1 |
| Palaeozoic Era | 1 |
| Paleozoic Era (within Phanerozoic) | 1 |
| PaleozoicEra | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T131981 — 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: Paleozoic Era Context triple: [Appalachian Mountains, geologicalAge, Paleozoic Era]
-
A.
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.
-
B.
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.
-
C.
Phanerozoic Eon
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.
-
D.
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.
-
E.
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.
- 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: Paleozoic Era Target entity description: The Paleozoic Era was an ancient geologic time interval, spanning roughly 541 to 252 million years ago, marked by the emergence and diversification of complex life in the seas and on land and the assembly of major continental landmasses.
-
A.
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.
-
B.
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.
-
C.
Phanerozoic Eon
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.
-
D.
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.
-
E.
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.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf | geologic era ⓘ |
| alternativeName |
Paleozoic Era
ⓘ
surface form:
Palaeozoic Era
|
| characterizedBy |
assembly of supercontinent Pangaea
ⓘ
colonization of land by arthropods ⓘ colonization of land by plants ⓘ diversification of marine invertebrates ⓘ emergence of complex animal life ⓘ evolution of vertebrates on land ⓘ formation of extensive coal swamps ⓘ major orogenies ⓘ multiple mass extinctions ⓘ |
| climate |
generally variable climate
ⓘ
periods of extensive glaciation ⓘ |
| contains |
Cambrian Period
ⓘ
Carboniferous period ⓘ
surface form:
Carboniferous Period
Devonian Period ⓘ Ordovician Period ⓘ Permian Period ⓘ Silurian ⓘ
surface form:
Silurian Period
|
| duration | approximately 289 million years ⓘ |
| endsWith |
Permian–Triassic mass extinction
ⓘ
surface form:
Permian–Triassic extinction event
|
| endTime | 252 million years ago ⓘ |
| fieldOfStudy |
geology
ⓘ
paleontology ⓘ |
| follows | Neoproterozoic Era ⓘ |
| majorEvent |
Cambrian explosion
ⓘ
Carboniferous rainforest collapse ⓘ Great Ordovician Biodiversification Event ⓘ Late Devonian extinction ⓘ Permian–Triassic mass extinction ⓘ |
| partOf | Phanerozoic Eon ⓘ |
| precedes | Mesozoic Era ⓘ |
| significance |
development of complex terrestrial ecosystems
ⓘ
first appearance of most major animal phyla in fossil record ⓘ major diversification of vertebrates ⓘ transition of life from sea to land ⓘ |
| startTime | 541 million years ago ⓘ |
| tectonicActivity |
closure of Iapetus Ocean
ⓘ
closure of Rheic Ocean ⓘ formation of Appalachian orogenies ⓘ formation of Ural orogeny ⓘ |
| typicalLifeForms |
ammonoids
ⓘ
brachiopods ⓘ early amphibians ⓘ early fishes ⓘ early reptiles ⓘ trilobites ⓘ vascular land plants ⓘ |
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: Paleozoic Era Description of subject: The Paleozoic Era was an ancient geologic time interval, spanning roughly 541 to 252 million years ago, marked by the emergence and diversification of complex life in the seas and on land and the assembly of major continental landmasses.
Referenced by (74)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Paleozoic
this entity surface form:
Palaeozoic
this entity surface form:
Paleozoic
this entity surface form:
Paleozoic
subject surface form:
Sudetes
this entity surface form:
Paleozoic
this entity surface form:
Paleozoic
subject surface form:
Laurussia
this entity surface form:
Paleozoic era
this entity surface form:
Paleozoic