Neoproterozoic Era
E45475
The Neoproterozoic Era was the final era of the Proterozoic Eon, marked by global “Snowball Earth” glaciations and the emergence of early multicellular life leading up to the Cambrian explosion.
All labels observed (9)
| Label | Occurrences |
|---|---|
| Neoproterozoic Era canonical | 15 |
| Neoproterozoic | 12 |
| Tonian Period | 4 |
| Neoproterozoic Eon | 3 |
| Cryogenian Period | 2 |
| Ediacaran | 1 |
| Ediacaran Period | 1 |
| Neoproterozoic era | 1 |
| Neoproterozoic geology | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T335903 — 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: Neoproterozoic Era Context triple: [Proterozoic Eon, subdivision, Neoproterozoic Era]
-
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.
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.
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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.
Precambrian Supereon
The Precambrian Supereon is the vast span of Earth's early history before the Phanerozoic, encompassing the Hadean, Archean, and Proterozoic eons during which the planet formed, life first appeared, and early continents and atmospheres developed.
- 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: Neoproterozoic Era Target entity description: The Neoproterozoic Era was the final era of the Proterozoic Eon, marked by global “Snowball Earth” glaciations and the emergence of early multicellular life leading up to the Cambrian explosion.
-
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.
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.
-
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.
Precambrian Supereon
The Precambrian Supereon is the vast span of Earth's early history before the Phanerozoic, encompassing the Hadean, Archean, and Proterozoic eons during which the planet formed, life first appeared, and early continents and atmospheres developed.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
geologic era
ⓘ
subdivision of the Proterozoic Eon ⓘ |
| associatedWith |
cap carbonate deposits
ⓘ
evolution of early algae ⓘ evolution of early animals ⓘ evolution of early fungi ⓘ evolution of early protists ⓘ large negative carbon isotope excursions ⓘ |
| characterizedBy |
appearance of Ediacaran biota
ⓘ
assembly of the supercontinent Pannotia ⓘ breakup of the supercontinent Rodinia ⓘ emergence of early multicellular life ⓘ global Snowball Earth glaciations ⓘ prelude to the Cambrian explosion ⓘ rise of atmospheric oxygen levels ⓘ widespread continental glaciation ⓘ |
| chronostratigraphicRank | era ⓘ |
| contains |
Neoproterozoic Era
self-linksurface differs
ⓘ
surface form:
Cryogenian Period
Ediacaran Period ⓘ Neoproterozoic Era self-linksurface differs ⓘ
surface form:
Tonian Period
|
| duration | approximately 459 million years ⓘ |
| endTime |
541 million years ago
ⓘ
approximately 541 million years ago ⓘ |
| environmentalChange |
changes in ocean chemistry
ⓘ
major climatic fluctuations ⓘ |
| followedBy | rapid diversification of animal life in the Cambrian ⓘ |
| follows | Mesoproterozoic Era ⓘ |
| geochronologicRank | era ⓘ |
| includesEvent |
Gaskiers glaciation
ⓘ
Marinoan glaciation ⓘ Snowball Earth glaciations ⓘ
surface form:
Snowball Earth episodes
Sturtian glaciation ⓘ |
| includesFossilAssemblage |
Ediacaran biota
ⓘ
surface form:
Ediacaran fauna
acritarch microfossils ⓘ soft-bodied macrofossils ⓘ |
| locationOf | glacial deposits on multiple continents ⓘ |
| namedAfter | Greek words for “new” and “earlier life” ⓘ |
| overlapsWith | evolution of complex multicellularity ⓘ |
| partOf |
Precambrian Supereon
ⓘ
Proterozoic Eon ⓘ |
| precededBy | Mesozoic glaciations of the Proterozoic ⓘ |
| precedes |
Cambrian Period
ⓘ
Paleozoic Era ⓘ |
| recognizedBy | International Commission on Stratigraphy ⓘ |
| startTime |
1.0 billion years ago
ⓘ
approximately 1000 million years ago ⓘ |
| temporalPosition | late Precambrian ⓘ |
| usedIn | 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: Neoproterozoic Era Description of subject: The Neoproterozoic Era was the final era of the Proterozoic Eon, marked by global “Snowball Earth” glaciations and the emergence of early multicellular life leading up to the Cambrian explosion.
Referenced by (40)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Ediacaran
this entity surface form:
Ediacaran Period
this entity surface form:
Cryogenian Period
subject surface form:
Pannotia
this entity surface form:
Tonian Period
this entity surface form:
Cryogenian Period
this entity surface form:
Neoproterozoic
this entity surface form:
Neoproterozoic
this entity surface form:
Neoproterozoic
this entity surface form:
Neoproterozoic Eon
this entity surface form:
Neoproterozoic
this entity surface form:
Neoproterozoic
this entity surface form:
Neoproterozoic
this entity surface form:
Tonian Period
this entity surface form:
Neoproterozoic Eon
subject surface form:
Proto-Africa
this entity surface form:
Neoproterozoic era
this entity surface form:
Neoproterozoic
this entity surface form:
Neoproterozoic Eon
this entity surface form:
Neoproterozoic
this entity surface form:
Neoproterozoic
this entity surface form:
Neoproterozoic geology
this entity surface form:
Tonian Period
this entity surface form:
Tonian Period
this entity surface form:
Neoproterozoic
this entity surface form:
Neoproterozoic
this entity surface form:
Neoproterozoic