Yoldia stage
E530327
The Yoldia stage is a postglacial Baltic Sea phase characterized by cold, brackish-water conditions and named after the bivalve Yoldia (Portlandia) arctica, whose fossils are typical of its sediments.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Yoldia Sea stage | 1 |
| Yoldia stage canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5571136 — 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: Yoldia stage Context triple: [Yoldiahavet, hasStratigraphicUnit, Yoldia stage]
-
A.
Statherian Period
The Statherian Period is the final division of the Paleoproterozoic Era, marked by the stabilization of continental cratons and significant crustal growth roughly 1.8 to 1.6 billion years ago.
-
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.
Stenian Period
The Stenian Period is the final division of the Mesoproterozoic Era, marked by the assembly of the supercontinent Rodinia and significant geological and tectonic activity roughly 1.2 to 1.0 billion years ago.
-
D.
Miaolingian
Miaolingian is a middle subdivision of the Cambrian Period characterized by significant diversification of marine life and important trilobite-bearing rock formations.
-
E.
Pridoli Epoch
The Pridoli Epoch is the final epoch of the Silurian Period, marking a transitional interval in Earth’s history just before the onset of the Devonian.
- 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: Yoldia stage Target entity description: The Yoldia stage is a postglacial Baltic Sea phase characterized by cold, brackish-water conditions and named after the bivalve Yoldia (Portlandia) arctica, whose fossils are typical of its sediments.
-
A.
Statherian Period
The Statherian Period is the final division of the Paleoproterozoic Era, marked by the stabilization of continental cratons and significant crustal growth roughly 1.8 to 1.6 billion years ago.
-
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.
Stenian Period
The Stenian Period is the final division of the Mesoproterozoic Era, marked by the assembly of the supercontinent Rodinia and significant geological and tectonic activity roughly 1.2 to 1.0 billion years ago.
-
D.
Miaolingian
Miaolingian is a middle subdivision of the Cambrian Period characterized by significant diversification of marine life and important trilobite-bearing rock formations.
-
E.
Pridoli Epoch
The Pridoli Epoch is the final epoch of the Silurian Period, marking a transitional interval in Earth’s history just before the onset of the Devonian.
- F. None of above. chosen
Statements (41)
| Predicate | Object |
|---|---|
| instanceOf |
geological stage
ⓘ
postglacial Baltic Sea phase ⓘ |
| characterizedBy |
cold brackish-water fauna
ⓘ
connection to the ocean ⓘ postglacial isostatic uplift ⓘ |
| evidencedBy |
marine microfossils
ⓘ
mollusc assemblages ⓘ sediment cores ⓘ |
| follows | Baltic Ice Lake ⓘ |
| hasAlternativeName |
Yoldia Sea stage
ⓘ
linked to:
Yoldia stage
|
| hasBoundaryDefinedBy |
changes in salinity
ⓘ
faunal turnover ⓘ stratigraphic markers ⓘ |
| hasClimateCharacteristic | cold conditions ⓘ |
| hasDeposits | Yoldia clay ⓘ |
| hasEnvironment | glaciomarine environment ⓘ |
| hasFaunalElement |
arctic-boreal molluscs
ⓘ
bivalves ⓘ |
| hasOriginProcess |
opening of marine connections
ⓘ
retreat of continental ice sheets ⓘ |
| hasSalinity | brackish ⓘ |
| hasTypicalFossil |
Portlandia arctica
ⓘ
Yoldia arctica ⓘ |
| hasTypicalSediment |
glaciomarine clay
ⓘ
marine clay ⓘ |
| hasWaterType | brackish water ⓘ |
| locatedIn |
Baltic Sea basin
ⓘ
linked to:
Baltic Sea drainage basin
Fennoscandian region ⓘ
linked to:
Fennoscandia
Northern Europe ⓘ |
| namedAfter |
Portlandia arctica
ⓘ
Yoldia arctica ⓘ |
| partOf | Baltic Sea history ⓘ |
| precedes | Ancylus Lake ⓘ |
| recognizedIn |
Baltic stratigraphy
ⓘ
Scandinavian stratigraphy ⓘ |
| studiedInDiscipline |
Quaternary geology
ⓘ
paleoclimatology ⓘ paleolimnology ⓘ |
| timeAfter | Last Glacial Maximum ⓘ |
| timeWithin |
Holocene transition
ⓘ
linked to:
Holocene
late Pleistocene–early Holocene ⓘ |
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: Yoldia stage Description of subject: The Yoldia stage is a postglacial Baltic Sea phase characterized by cold, brackish-water conditions and named after the bivalve Yoldia (Portlandia) arctica, whose fossils are typical of its sediments.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject linked to:
Yoldiahavet (Swedish)
linked to: Yoldia stage