Neoarchean Era
E252555
The Neoarchean Era was the final phase of the Archean Eon, marked by significant continental growth, stabilization of cratons, and the emergence of early oxygen-producing photosynthetic life.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Neoarchean Era canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T2000523 — 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: Neoarchean Era Context triple: [Archean Eon, subdividedInto, Neoarchean Era]
-
A.
Mesoarchean Era
The Mesoarchean Era is a division of early Earth history, roughly 3.2 to 2.8 billion years ago, marked by the stabilization of continental crust and the continued evolution of early life.
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B.
Paleoarchean Era
The Paleoarchean Era is an early division of Earth's geologic history marked by the stabilization of the first continental crust and the emergence of some of the oldest known life forms.
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C.
Paleoproterozoic Era
The Paleoproterozoic Era was an early division of Earth's history marked by the stabilization of continental cratons, widespread banded iron formations, and the Great Oxidation Event that significantly increased atmospheric oxygen.
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D.
Archean Eon
The Archean Eon is an ancient geological eon of Earth's history, spanning from about 4.0 to 2.5 billion years ago, characterized by the formation of the first stable continental crust and the earliest known life.
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E.
Mesoproterozoic Era
The Mesoproterozoic Era was a middle division of Earth's Proterozoic Eon characterized by the stabilization of continental cratons, widespread sedimentary basin development, and significant evolutionary advances in eukaryotic life.
- 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: Neoarchean Era Target entity description: The Neoarchean Era was the final phase of the Archean Eon, marked by significant continental growth, stabilization of cratons, and the emergence of early oxygen-producing photosynthetic life.
-
A.
Mesoarchean Era
The Mesoarchean Era is a division of early Earth history, roughly 3.2 to 2.8 billion years ago, marked by the stabilization of continental crust and the continued evolution of early life.
-
B.
Paleoarchean Era
The Paleoarchean Era is an early division of Earth's geologic history marked by the stabilization of the first continental crust and the emergence of some of the oldest known life forms.
-
C.
Paleoproterozoic Era
The Paleoproterozoic Era was an early division of Earth's history marked by the stabilization of continental cratons, widespread banded iron formations, and the Great Oxidation Event that significantly increased atmospheric oxygen.
-
D.
Archean Eon
The Archean Eon is an ancient geological eon of Earth's history, spanning from about 4.0 to 2.5 billion years ago, characterized by the formation of the first stable continental crust and the earliest known life.
-
E.
Mesoproterozoic Era
The Mesoproterozoic Era was a middle division of Earth's Proterozoic Eon characterized by the stabilization of continental cratons, widespread sedimentary basin development, and significant evolutionary advances in eukaryotic life.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
geological era
ⓘ
subdivision of the Archean Eon ⓘ |
| associatedWith |
banded iron formation deposition
ⓘ
development of early sedimentary basins ⓘ early oxygenation of surface environments ⓘ early plate tectonic-style processes ⓘ emergence of shallow marine platforms ⓘ evolution of cyanobacteria-like organisms ⓘ formation of proto-continents ⓘ komatiitic volcanism ⓘ microbial mat ecosystems ⓘ stabilization of Archean cratons ⓘ stromatolite development ⓘ |
| characterizedBy |
development of large stable continental blocks
ⓘ
emergence of oxygen-producing photosynthetic life ⓘ granite–greenstone terranes ⓘ growth of continental lithosphere ⓘ high heat flow from Earth’s interior ⓘ intense volcanic activity ⓘ major crustal differentiation ⓘ significant continental growth ⓘ stabilization of cratons ⓘ widespread greenstone belts ⓘ |
| definedBy | International Commission on Stratigraphy ⓘ |
| duration | approximately 300 million years ⓘ |
| endMarkedBy |
increasing atmospheric oxygen trends
ⓘ
transition to Paleoproterozoic tectonic regimes ⓘ |
| endTime | 2500 million years ago ⓘ |
| follows | Mesoarchean Era ⓘ |
| geologicTimeScaleRank | era ⓘ |
| hasGlobalExtent | Earth ⓘ |
| importantFor |
reconstruction of early atmosphere composition
ⓘ
study of early biosphere development ⓘ study of early continental evolution ⓘ understanding early Earth tectonics ⓘ |
| isFinalEraOf | Archean Eon ⓘ |
| leadsTo | conditions for the Great Oxidation Event ⓘ |
| overlapsWith | late Archean crust-forming events ⓘ |
| partOf | Archean Eon ⓘ |
| precededBy | low atmospheric oxygen levels ⓘ |
| precedes | Paleoproterozoic Era ⓘ |
| startTime | 2800 million years ago ⓘ |
| timeScaleType |
Precambrian Supereon
ⓘ
surface form:
Precambrian
|
| typicalRockRecordIncludes |
chemical sedimentary rocks such as banded iron formations
ⓘ
granitoid plutons ⓘ metamorphosed volcanic sequences ⓘ |
| usedIn | international geologic time scale ⓘ |
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: Neoarchean Era Description of subject: The Neoarchean Era was the final phase of the Archean Eon, marked by significant continental growth, stabilization of cratons, and the emergence of early oxygen-producing photosynthetic life.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.