Marinoan glaciation
E231931
The Marinoan glaciation was a major Neoproterozoic ice age, likely a global or near-global “Snowball Earth” event that occurred around 650–635 million years ago.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Marinoan glaciation canonical | 4 |
| Elatina glaciation | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2047010 — 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.
Target entity: Marinoan glaciation Context triple: [Neoproterozoic Era, includesEvent, Marinoan glaciation]
-
A.
Sturtian glaciation
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.
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B.
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.
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C.
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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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.
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.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
Target entity: Marinoan glaciation Target entity description: The Marinoan glaciation was a major Neoproterozoic ice age, likely a global or near-global “Snowball Earth” event that occurred around 650–635 million years ago.
-
A.
Sturtian glaciation
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.
-
B.
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.
-
C.
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.
-
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.
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.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
Neoproterozoic ice age
ⓘ
Snowball Earth event ⓘ glaciation event ⓘ |
| alsoKnownAs |
Marinoan glaciation
ⓘ
surface form:
Elatina glaciation
|
| associatedWith |
changes in ocean chemistry
ⓘ
large negative carbon isotope excursions ⓘ perturbations of the global carbon cycle ⓘ rise in atmospheric oxygen levels (hypothesized) ⓘ |
| causedBy |
continental configuration favoring ice growth (hypothesized)
ⓘ
long-term drawdown of atmospheric CO₂ (hypothesized) ⓘ |
| characterizedBy |
extensive continental ice sheets
ⓘ
low-latitude glaciation ⓘ |
| climateExtent | global or near-global ⓘ |
| climateModel |
Snowball Earth glaciations
ⓘ
surface form:
Snowball Earth hypothesis
|
| duration | on the order of several million years ⓘ |
| endMarkedBy | deposition of cap carbonates ⓘ |
| endTime | approximately 635 million years ago ⓘ |
| evidenceFrom |
cap carbonates
ⓘ
dropstones in marine sediments ⓘ glacial diamictites ⓘ paleomagnetic data indicating low-latitude ice ⓘ |
| fieldOfStudy |
Neoproterozoic Era
ⓘ
surface form:
Neoproterozoic geology
paleoclimatology ⓘ stratigraphy ⓘ |
| followedBy | Ediacaran Period ⓘ |
| follows | Sturtian glaciation ⓘ |
| geologicalAge | late Cryogenian, ca. 650–635 Ma ⓘ |
| geologicalPeriod |
Neoproterozoic Era
ⓘ
surface form:
Neoproterozoic
|
| impactOn | subsequent Ediacaran biotic diversification (hypothesized) ⓘ |
| locationEvidence |
Canada
ⓘ
China ⓘ Namibia ⓘ Northern Canada ⓘ
surface form:
Northwest Canada
South Australia ⓘ Svalbard ⓘ |
| namedAfter | Marino, South Australia ⓘ |
| partOf |
Snowball Earth glaciations
ⓘ
surface form:
Cryogenian glaciations
Snowball Earth glaciations ⓘ
surface form:
Neoproterozoic Snowball Earth episodes
|
| precededBy | Sturtian glaciation ⓘ |
| precedes | Ediacaran Period ⓘ |
| relatedConcept |
Ediacaran biota
ⓘ
Snowball Earth glaciations ⓘ
surface form:
Snowball Earth
Sturtian glaciation ⓘ |
| significance |
key constraint on Cryogenian–Ediacaran boundary
ⓘ
one of the most severe ice ages in Earth history ⓘ |
| startTime | approximately 650 million years ago ⓘ |
| terminationMechanism | accumulation of volcanic CO₂ leading to greenhouse warming (hypothesized) ⓘ |
| timeSpan |
Cryogenian Period
ⓘ
surface form:
late Cryogenian Period
|
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.
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.
Subject: Marinoan glaciation Description of subject: The Marinoan glaciation was a major Neoproterozoic ice age, likely a global or near-global “Snowball Earth” event that occurred around 650–635 million years ago.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.