Northgrippian
E87430
The Northgrippian is the middle age of the Holocene epoch, defined by a significant global cooling event that occurred around 4,200 years ago.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Northgrippian canonical | 4 |
| Northgrippian age | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T742168 — 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: Northgrippian Context triple: [Holocene, hasStage, Northgrippian]
-
A.
Leqembi
Leqembi is an Alzheimer’s disease drug (lecanemab) that targets amyloid-beta plaques to slow cognitive decline in early-stage patients.
-
B.
Windigo
Windigo is a small visitor area and campground on the remote western end of Isle Royale in Lake Superior, serving as a key entry point and services hub for park visitors.
-
C.
Inuktun
Inuktun is a dialect of the Inuit language spoken by the Inughuit people of northwestern Greenland.
-
D.
The Germ
The Germ was a short-lived 1850 periodical founded by members of the Pre-Raphaelite Brotherhood to promote their artistic and literary ideals.
-
E.
Nemocón
Nemocón is a Colombian town in the department of Cundinamarca, best known for its historic underground salt mine and scenic Andean surroundings.
- 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: Northgrippian Target entity description: The Northgrippian is the middle age of the Holocene epoch, defined by a significant global cooling event that occurred around 4,200 years ago.
-
A.
Leqembi
Leqembi is an Alzheimer’s disease drug (lecanemab) that targets amyloid-beta plaques to slow cognitive decline in early-stage patients.
-
B.
Windigo
Windigo is a small visitor area and campground on the remote western end of Isle Royale in Lake Superior, serving as a key entry point and services hub for park visitors.
-
C.
Inuktun
Inuktun is a dialect of the Inuit language spoken by the Inughuit people of northwestern Greenland.
-
D.
The Germ
The Germ was a short-lived 1850 periodical founded by members of the Pre-Raphaelite Brotherhood to promote their artistic and literary ideals.
-
E.
Nemocón
Nemocón is a Colombian town in the department of Cundinamarca, best known for its historic underground salt mine and scenic Andean surroundings.
- F. None of above. chosen
Statements (41)
| Predicate | Object |
|---|---|
| instanceOf |
chronostratigraphic stage
ⓘ
geochronologic age ⓘ |
| chronologicalContext |
follows early Holocene warming
ⓘ
precedes late Holocene Meghalayan age ⓘ |
| climateCharacteristic |
cooler and drier conditions in many regions
ⓘ
increased aridity in subtropical regions ⓘ |
| climateProxyEvidence |
Greenland ice cores
ⓘ
lake sediment records ⓘ marine sediment cores ⓘ speleothem records ⓘ |
| definedBy |
International Commission on Stratigraphy
ⓘ
International Union of Geological Sciences ⓘ |
| definingEvent |
4.2 kiloyear event
ⓘ
abrupt climate change ⓘ significant global cooling event ⓘ |
| duration | from 4.2 ka BP to 4.2–3.2 ka BP boundary with Meghalayan ⓘ |
| endTime |
4200 years before present to 4200–3200 years before present boundary
ⓘ
circa 2250–1950 BCE boundary to Meghalayan ⓘ |
| follows | Greenlandian ⓘ |
| formalizedIn | 2018 ⓘ |
| GSSP | NorthGRIP ice core, Greenland ⓘ |
| GSSPApprovalYear | 2018 ⓘ |
| hasApproximateStart | 4.2 ka BP is 1950 CE minus 4200 years ⓘ |
| namedAfter | NorthGRIP ice core ⓘ |
| partOf |
Holocene epoch
ⓘ
linked to:
Holocene
|
| positionInHolocene | middle age of the Holocene ⓘ |
| precedes | Meghalayan ⓘ |
| rank |
age
ⓘ
stage ⓘ |
| relatedEvent |
collapse or stress of several early complex societies
ⓘ
hydrological changes in monsoon regions ⓘ |
| startTime |
4200 years before present
ⓘ
circa 2250 BCE ⓘ |
| stratotype | NorthGRIP ice core in central Greenland ⓘ |
| subdivisionOf |
Cenozoic era
ⓘ
linked to:
Cenozoic
Phanerozoic eon ⓘ
linked to:
Phanerozoic Eon
Quaternary period ⓘ |
| timeScale | International Chronostratigraphic Chart ⓘ |
| usedIn |
Holocene subdivision
ⓘ
Quaternary stratigraphy ⓘ
linked to:
Quaternary period
paleoclimate studies ⓘ |
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: Northgrippian Description of subject: The Northgrippian is the middle age of the Holocene epoch, defined by a significant global cooling event that occurred around 4,200 years ago.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Northgrippian