Pliensbachian
E196699
The Pliensbachian is a stage of the Early Jurassic period characterized by distinctive marine faunas and important ammonite biostratigraphy.
All labels observed (8)
| Label | Occurrences |
|---|---|
| Pliensbachian canonical | 2 |
| Pliensbach | 1 |
| Pliensbachian Age | 1 |
| Pliensbachian age | 1 |
| Pliensbachian–Toarcian boundary | 1 |
| Sinemurian Stage | 1 |
| Sinemurian age | 1 |
| Sinemurian stage | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1758853 — 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: Pliensbachian Context triple: [Early Jurassic, contains, Pliensbachian]
-
A.
Maastrichtian
The Maastrichtian is the final stage of the Late Cretaceous period, marking the last interval of non-avian dinosaur dominance before the mass extinction event 66 million years ago.
-
B.
Early Jurassic
The Early Jurassic was the first epoch of the Jurassic Period, marked by the recovery of life after the end-Triassic extinction and the early diversification of dinosaurs and marine reptiles.
-
C.
Cretaceous
The Cretaceous was the final period of the Mesozoic Era, marked by high sea levels, diverse dinosaurs, and ending with the mass extinction that wiped them out about 66 million years ago.
-
D.
Silurian
The Silurian is a geologic period of the Paleozoic Era, roughly 443 to 419 million years ago, marked by the stabilization of Earth’s climate, widespread shallow seas, and significant diversification of early marine life and the first land plants.
-
E.
Triassic
The Triassic was the first period of the Mesozoic Era, marked by the initial diversification of dinosaurs and the recovery of life following the Permian–Triassic mass extinction.
- 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: Pliensbachian Target entity description: The Pliensbachian is a stage of the Early Jurassic period characterized by distinctive marine faunas and important ammonite biostratigraphy.
-
A.
Maastrichtian
The Maastrichtian is the final stage of the Late Cretaceous period, marking the last interval of non-avian dinosaur dominance before the mass extinction event 66 million years ago.
-
B.
Early Jurassic
The Early Jurassic was the first epoch of the Jurassic Period, marked by the recovery of life after the end-Triassic extinction and the early diversification of dinosaurs and marine reptiles.
-
C.
Cretaceous
The Cretaceous was the final period of the Mesozoic Era, marked by high sea levels, diverse dinosaurs, and ending with the mass extinction that wiped them out about 66 million years ago.
-
D.
Silurian
The Silurian is a geologic period of the Paleozoic Era, roughly 443 to 419 million years ago, marked by the stabilization of Earth’s climate, widespread shallow seas, and significant diversification of early marine life and the first land plants.
-
E.
Triassic
The Triassic was the first period of the Mesozoic Era, marked by the initial diversification of dinosaurs and the recovery of life following the Permian–Triassic mass extinction.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
Early Jurassic stage
ⓘ
chronostratigraphic stage ⓘ geologic time interval ⓘ |
| biozonationBasedOn | ammonite assemblages ⓘ |
| characterizedBy |
abundant ammonites
ⓘ
distinctive marine faunas ⓘ important ammonite zonation ⓘ |
| chronEquivalent |
Pliensbachian
self-linksurface differs
ⓘ
surface form:
Pliensbachian Age
|
| climate | generally temperate to warm marine conditions ⓘ |
| contains |
Davoei Zone
ⓘ
Ibex Zone ⓘ Jamesoni Zone ⓘ Margaritatus Zone ⓘ Spinatum Zone ⓘ |
| correlatesWith |
regional stages in Europe
ⓘ
regional stages in North Africa ⓘ regional stages in North America ⓘ |
| environmentDominant | open marine shelf settings ⓘ |
| follows | Sinemurian ⓘ |
| GSSPDefinedBy |
first appearance of ammonite Apoderoceras
ⓘ
first appearance of ammonite Bifericeras donovani ⓘ |
| GSSPLocation |
Robin Hood's Bay
ⓘ
surface form:
Wine Haven, Robin Hood’s Bay, Yorkshire, England
|
| importantFossilGroup |
ammonites
ⓘ
bivalves ⓘ brachiopods ⓘ marine reptiles ⓘ |
| lithologyTypical |
limestones
ⓘ
marine shales ⓘ siltstones ⓘ |
| namedAfter |
Pliensbachian
self-linksurface differs
ⓘ
surface form:
Pliensbach
|
| namedFor | Pliensbach village in Germany ⓘ |
| paleogeography | dominance of epicontinental seas ⓘ |
| partOf |
Early Jurassic
ⓘ
Jurassic ⓘ |
| positionInJurassic | third stage of the Early Jurassic ⓘ |
| precedes | Toarcian ⓘ |
| rank | stage ⓘ |
| standardizedBy | International Commission on Stratigraphy ⓘ |
| stratigraphicUsage | global chronostratigraphic standard ⓘ |
| subdivisionOf |
Early Jurassic
ⓘ
surface form:
Lower Jurassic Series
|
| timeEnd | around 182.7 million years ago ⓘ |
| timeScale |
Mesozoic Era
ⓘ
surface form:
Mesozoic
Phanerozoic Eon ⓘ |
| timeStart | around 190.8 million years ago ⓘ |
| usedFor |
global marine correlation
ⓘ
refining Early Jurassic timescale ⓘ |
| usedIn | ammonite biostratigraphy ⓘ |
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: Pliensbachian Description of subject: The Pliensbachian is a stage of the Early Jurassic period characterized by distinctive marine faunas and important ammonite biostratigraphy.
Referenced by (9)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Pliensbach
this entity surface form:
Pliensbachian Age
this entity surface form:
Pliensbachian–Toarcian boundary
this entity surface form:
Sinemurian Stage
this entity surface form:
Sinemurian age
this entity surface form:
Pliensbachian age
this entity surface form:
Sinemurian stage