Sturtian glaciation
E228191
The Sturtian glaciation was a major global ice age during the Neoproterozoic, when extensive ice sheets may have covered much of Earth’s surface in one of the most severe glacial events in the planet’s history.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Sturtian glaciation canonical | 6 |
How this entity was disambiguated
This entity first appeared as the object of triple T2047009 — 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: Sturtian glaciation Context triple: [Neoproterozoic Era, includesEvent, Sturtian glaciation]
-
A.
Huronian glaciation
The Huronian glaciation was one of Earth's earliest and longest ice ages, occurring over 2.4 billion years ago and likely linked to the Great Oxidation Event and major climatic shifts.
-
B.
Rhyacian Period
The Rhyacian Period is a geologic time interval in the early Proterozoic characterized by significant crustal growth, widespread metamorphism, and some of the earliest known large-scale glaciations.
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C.
Last Glacial Maximum
The Last Glacial Maximum was the most recent period in Earth’s history when ice sheets reached their greatest extent, dramatically lowering sea levels and reshaping global climates and ecosystems.
-
D.
Cenozoic glaciations
Cenozoic glaciations are a series of major ice age cycles during the Cenozoic Era that saw extensive growth and retreat of continental ice sheets, profoundly shaping Earth’s climate and landscapes.
-
E.
Younger Dryas cold event
The Younger Dryas cold event was a brief, abrupt return to near-glacial conditions about 12,900–11,700 years ago that interrupted the general warming trend at the end of the last Ice Age.
- 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: Sturtian glaciation Target entity description: The Sturtian glaciation was a major global ice age during the Neoproterozoic, when extensive ice sheets may have covered much of Earth’s surface in one of the most severe glacial events in the planet’s history.
-
A.
Huronian glaciation
The Huronian glaciation was one of Earth's earliest and longest ice ages, occurring over 2.4 billion years ago and likely linked to the Great Oxidation Event and major climatic shifts.
-
B.
Rhyacian Period
The Rhyacian Period is a geologic time interval in the early Proterozoic characterized by significant crustal growth, widespread metamorphism, and some of the earliest known large-scale glaciations.
-
C.
Last Glacial Maximum
The Last Glacial Maximum was the most recent period in Earth’s history when ice sheets reached their greatest extent, dramatically lowering sea levels and reshaping global climates and ecosystems.
-
D.
Cenozoic glaciations
Cenozoic glaciations are a series of major ice age cycles during the Cenozoic Era that saw extensive growth and retreat of continental ice sheets, profoundly shaping Earth’s climate and landscapes.
-
E.
Younger Dryas cold event
The Younger Dryas cold event was a brief, abrupt return to near-glacial conditions about 12,900–11,700 years ago that interrupted the general warming trend at the end of the last Ice Age.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
Neoproterozoic glaciation
ⓘ
glaciation event ⓘ paleoclimatic event ⓘ snowball Earth event ⓘ |
| characterizedBy |
dropstones in marine sediments
ⓘ
evidence for near-global ice cover ⓘ glacial striations on bedrock ⓘ low-latitude glacial deposits ⓘ negative carbon isotope excursions ⓘ |
| duration | about 57 million years ⓘ |
| endTime | approximately 660 million years ago ⓘ |
| evidenceFoundIn |
Adelaide Rift Complex
ⓘ
Africa ⓘ China ⓘ Greenland ⓘ North America ⓘ South America ⓘ Svalbard ⓘ |
| followedBy | Marinoan glaciation ⓘ |
| follows | Kaigas glaciation ⓘ |
| hasCause |
changes in continental configuration
ⓘ
changes in solar insolation and albedo feedbacks ⓘ enhanced silicate weathering ⓘ possible decline in volcanic CO2 emissions ⓘ reduced atmospheric greenhouse gas concentrations ⓘ |
| hasEffect |
deposition of glacial diamictites
ⓘ
extensive continental glaciation ⓘ formation of cap carbonates after deglaciation ⓘ global cooling ⓘ major changes in ocean chemistry ⓘ perturbation of the carbon cycle ⓘ |
| locatedIn |
Australia
ⓘ
surface form:
Australia (type area)
South Australia ⓘ |
| namedAfter |
Charles Sturt
ⓘ
Areyonga Formation ⓘ
surface form:
Sturt Formation
Sturt River NERFINISHED ⓘ |
| partOf |
Cryogenian Period
ⓘ
surface form:
Cryogenian period
Neoproterozoic Era ⓘ
surface form:
Neoproterozoic era
|
| significantFor |
constraints on Neoproterozoic climate models
ⓘ
evolution of early complex life ⓘ understanding snowball Earth hypotheses ⓘ |
| startTime | approximately 717 million years ago ⓘ |
| studiedInDiscipline |
Earth system science
ⓘ
geochemistry ⓘ geology ⓘ paleoclimatology ⓘ stratigraphy ⓘ |
| temporalLocation |
Cryogenian Period
ⓘ
surface form:
Cryogenian
Neoproterozoic Era ⓘ
surface form:
Neoproterozoic
|
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: Sturtian glaciation Description of subject: The Sturtian glaciation was a major global ice age during the Neoproterozoic, when extensive ice sheets may have covered much of Earth’s surface in one of the most severe glacial events in the planet’s history.
Referenced by (6)
Full triples — surface form annotated when it differs from this entity's canonical label.