Ancylus Lake
E27290
Ancylus Lake was a large freshwater body that occupied the Baltic Sea basin after the last Ice Age, before it evolved into the modern brackish Baltic Sea.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Ancylus Lake canonical | 7 |
| Ancylus Lake stage | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T133388 — 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: Ancylus Lake Context triple: [Baltic Sea, precededBy, Ancylus Lake]
-
A.
Walker Lake
Walker Lake is a large natural desert lake in western Nevada known for its shrinking water levels and importance as a habitat for migratory birds and native fish.
-
B.
Silver Lake
Silver Lake is a trendy, historically bohemian neighborhood in central Los Angeles known for its reservoir, hillside homes, and vibrant arts, dining, and nightlife scenes.
-
C.
San Andreas Lake
San Andreas Lake is a long, narrow reservoir on the San Francisco Peninsula in California, best known for lending its name to the nearby San Andreas Fault.
-
D.
Lake Carnegie
Lake Carnegie is a man-made lake in Princeton, New Jersey, best known as a rowing and recreational waterway associated with Princeton University.
-
E.
The Lake
The Lake is a village-like neighborhood in Newton, Massachusetts, known for its strong community identity and historically Irish-American roots.
- 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: Ancylus Lake Target entity description: Ancylus Lake was a large freshwater body that occupied the Baltic Sea basin after the last Ice Age, before it evolved into the modern brackish Baltic Sea.
-
A.
Walker Lake
Walker Lake is a large natural desert lake in western Nevada known for its shrinking water levels and importance as a habitat for migratory birds and native fish.
-
B.
Silver Lake
Silver Lake is a trendy, historically bohemian neighborhood in central Los Angeles known for its reservoir, hillside homes, and vibrant arts, dining, and nightlife scenes.
-
C.
San Andreas Lake
San Andreas Lake is a long, narrow reservoir on the San Francisco Peninsula in California, best known for lending its name to the nearby San Andreas Fault.
-
D.
Lake Carnegie
Lake Carnegie is a man-made lake in Princeton, New Jersey, best known as a rowing and recreational waterway associated with Princeton University.
-
E.
The Lake
The Lake is a village-like neighborhood in Newton, Massachusetts, known for its strong community identity and historically Irish-American roots.
- F. None of above. chosen
Statements (42)
| Predicate | Object |
|---|---|
| instanceOf |
freshwater body
ⓘ
geological formation ⓘ prehistoric lake ⓘ |
| afterEvent |
Weichselian glaciation
ⓘ
last Ice Age ⓘ |
| approximateEnd | about 8,000 years before present ⓘ |
| approximateStart | about 10,700 years before present ⓘ |
| basin |
Baltic Sea
ⓘ
surface form:
Baltic Sea basin
|
| causeOfChange | transition to more marine conditions in the Baltic basin ⓘ |
| characterizedBy |
low salinity
ⓘ
rising water level relative to land ⓘ |
| drainage |
freshwater outflow to the North Sea
ⓘ
outflow via central Swedish lowlands ⓘ |
| endedDueTo |
opening of new connections to the ocean
ⓘ
relative sea-level rise in the North Atlantic region ⓘ |
| followedBy |
Littorina Sea
ⓘ
brackish Baltic Sea ⓘ |
| formedBy |
isostatic rebound of Fennoscandia
ⓘ
melting of continental ice sheets ⓘ |
| hasEvidence |
freshwater diatom assemblages
ⓘ
freshwater mollusc fossils ⓘ varved clays ⓘ |
| hasStratigraphicUnit | Ancylus transgression ⓘ |
| influencedRegion |
coastal geomorphology of Scandinavia
ⓘ
coastal geomorphology of northern Poland ⓘ coastal geomorphology of the Baltic states ⓘ |
| knownFrom |
raised shorelines around the Baltic basin
ⓘ
sediment cores in the Baltic region ⓘ |
| locatedIn |
Fennoscandia
ⓘ
surface form:
Fennoscandian region
Northern Europe ⓘ |
| namedAfter | Ancylus fluviatilis ⓘ |
| nameEtymology | named for a freshwater snail genus found in its sediments ⓘ |
| paleoenvironment | postglacial freshwater environment ⓘ |
| partOf | Baltic Sea evolution ⓘ |
| partOfSequence |
Baltic Ice Lake
ⓘ
surface form:
Baltic Ice Lake – Yoldia Sea – Ancylus Lake – Littorina Sea
|
| precededBy | Baltic Ice Lake ⓘ |
| salinity | near 0‰ ⓘ |
| studiedInDiscipline |
Quaternary geology
ⓘ
paleogeography ⓘ paleolimnology ⓘ |
| timePeriod | early Holocene ⓘ |
| waterType | freshwater ⓘ |
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: Ancylus Lake Description of subject: Ancylus Lake was a large freshwater body that occupied the Baltic Sea basin after the last Ice Age, before it evolved into the modern brackish Baltic Sea.
Referenced by (8)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Yoldiahavet
this entity surface form:
Ancylus Lake stage