Middle Jurassic
E298686
The Middle Jurassic is a geologic epoch of the Mesozoic Era characterized by the diversification of dinosaurs, marine reptiles, and early birds, occurring between the Early and Late Jurassic periods.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Middle Jurassic canonical | 12 |
How this entity was disambiguated
This entity first appeared as the object of triple T2796196 — 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: Middle Jurassic Context triple: [Late Jurassic, follows, Middle Jurassic]
-
A.
Late Jurassic
The Late Jurassic was the final epoch of the Jurassic Period, marked by warm climates, high sea levels, and the flourishing of large dinosaurs and early birds.
-
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.
Middle Triassic
The Middle Triassic is the middle epoch of the Triassic Period, marked by the recovery of life after the end-Permian mass extinction and the early diversification of dinosaurs and marine reptiles.
-
D.
Middle Devonian
The Middle Devonian is a subdivision of the Devonian Period, dating to roughly 393–383 million years ago, marked by extensive marine life diversification and the continued evolution of early terrestrial ecosystems.
-
E.
Late Triassic
The Late Triassic was a geologic period and epoch, roughly 237–201 million years ago, marked by the diversification of early dinosaurs and the end-Triassic mass extinction that paved the way for Jurassic ecosystems.
- 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: Middle Jurassic Target entity description: The Middle Jurassic is a geologic epoch of the Mesozoic Era characterized by the diversification of dinosaurs, marine reptiles, and early birds, occurring between the Early and Late Jurassic periods.
-
A.
Late Jurassic
The Late Jurassic was the final epoch of the Jurassic Period, marked by warm climates, high sea levels, and the flourishing of large dinosaurs and early birds.
-
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.
Middle Triassic
The Middle Triassic is the middle epoch of the Triassic Period, marked by the recovery of life after the end-Permian mass extinction and the early diversification of dinosaurs and marine reptiles.
-
D.
Middle Devonian
The Middle Devonian is a subdivision of the Devonian Period, dating to roughly 393–383 million years ago, marked by extensive marine life diversification and the continued evolution of early terrestrial ecosystems.
-
E.
Late Triassic
The Late Triassic was a geologic period and epoch, roughly 237–201 million years ago, marked by the diversification of early dinosaurs and the end-Triassic mass extinction that paved the way for Jurassic ecosystems.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
geologic epoch
ⓘ
subdivision of the Jurassic Period ⓘ |
| biostratigraphicMarkers | ammonite zonations ⓘ |
| characterizedBy |
abundant ammonites
ⓘ
active plate tectonics ⓘ development of extensive carbonate platforms ⓘ diverse belemnites ⓘ diversification of dinosaurs ⓘ diversification of gymnosperm-dominated floras ⓘ diversification of marine reptiles ⓘ evolution of early mammals ⓘ expansion of shallow epicontinental seas ⓘ high sea levels ⓘ radiation of early birds and bird-line theropods ⓘ relatively warm global climate ⓘ |
| contains |
Aalenian
ⓘ
Bajocian ⓘ Bathonian ⓘ Callovian ⓘ |
| definedBy | International Commission on Stratigraphy ⓘ |
| duration | about 11 million years ⓘ |
| end | approximately 163 million years ago ⓘ |
| follows | Early Jurassic ⓘ |
| hasNotableDinosaurGroups |
sauropods
ⓘ
stegosaurs ⓘ theropods ⓘ |
| hasNotableMarineReptiles |
ichthyosaurs
ⓘ
plesiosaurs ⓘ pliosaurs ⓘ |
| hasRepresentativeFormations |
Bathonian-age limestones of Europe
ⓘ
marine shales and sandstones on continental margins ⓘ |
| importantFor |
correlation of Jurassic rock units worldwide
ⓘ
study of dinosaur evolution ⓘ study of marine reptile evolution ⓘ understanding Mesozoic climate ⓘ |
| lithostratigraphicExpression |
continental sedimentary rocks
ⓘ
marine sedimentary rocks ⓘ |
| paleogeography |
development of Tethys Ocean seaways
ⓘ
fragmentation of Pangaea ⓘ opening of the central Atlantic Ocean ⓘ |
| partOf |
Jurassic Period
ⓘ
Mesozoic Era ⓘ |
| precedes | Late Jurassic ⓘ |
| start | approximately 174 million years ago ⓘ |
| topDefinedBy | first appearance of the ammonite genus Kepplerites ⓘ |
| usedIn |
chronostratigraphy
ⓘ
geologic time scale ⓘ |
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: Middle Jurassic Description of subject: The Middle Jurassic is a geologic epoch of the Mesozoic Era characterized by the diversification of dinosaurs, marine reptiles, and early birds, occurring between the Early and Late Jurassic periods.
Referenced by (12)
Full triples — surface form annotated when it differs from this entity's canonical label.