Middle Triassic
E201670
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.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Middle Triassic canonical | 3 |
| Early Triassic | 1 |
| Middle Triassic Series | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1772717 — 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 Triassic Context triple: [Triassic, subdividedInto, Middle Triassic]
-
A.
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.
-
B.
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.
-
C.
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.
-
D.
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.
-
E.
Devonian Period
The Devonian Period was a division of the Paleozoic Era characterized by the diversification of fish, the first significant colonization of land by plants and early tetrapods, and major reef-building in the oceans.
- 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 Triassic Target entity description: 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.
-
A.
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.
-
B.
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.
-
C.
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.
-
D.
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.
-
E.
Devonian Period
The Devonian Period was a division of the Paleozoic Era characterized by the diversification of fish, the first significant colonization of land by plants and early tetrapods, and major reef-building in the oceans.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf | geologic epoch ⓘ |
| associatedWith |
supercontinent Pangaea
ⓘ
surface form:
Pangaea supercontinent configuration
generally warm and seasonally arid climate ⓘ |
| bioticTrend | transition from disaster faunas to more complex ecosystems ⓘ |
| characterizedBy |
development of modern-style marine ecosystems
ⓘ
diversification of marine reptiles ⓘ early diversification of dinosaurs ⓘ expansion of reef ecosystems ⓘ radiation of ammonoids ⓘ radiation of bivalves ⓘ radiation of conodonts ⓘ recovery of life after the end-Permian mass extinction ⓘ stabilization of global climate after Early Triassic extremes ⓘ |
| chronostratigraphicUnit | series ⓘ |
| containsFirstAppearance |
early true dinosaurs
ⓘ
many marine reptile clades ⓘ |
| correspondsTo |
Middle Triassic
self-linksurface differs
ⓘ
surface form:
Middle Triassic Series
|
| definedBy | Global Boundary Stratotype Section and Point for the base of the Anisian ⓘ |
| end | approximately 237 million years ago ⓘ |
| endUncertainty | ±1.0 million years ⓘ |
| follows |
Middle Triassic
self-linksurface differs
ⓘ
surface form:
Early Triassic
|
| followsEvent |
Permian–Triassic mass extinction
ⓘ
surface form:
end-Permian mass extinction
|
| geochronologicUnit | epoch ⓘ |
| GSSPBaseLocatedAt | Deşli Caira section, Romania ⓘ |
| hasAbbreviation | Middle Tr. ⓘ |
| hasColorOnGeologicChart | light green ⓘ |
| importantFossilGroups |
ammonoids
ⓘ
archosaurs ⓘ conodonts ⓘ early dinosaurs ⓘ ichthyosaurs ⓘ nothosaurs ⓘ placodonts ⓘ therapsids ⓘ |
| paleoclimate | generally monsoonal patterns in many regions ⓘ |
| paleogeography | dominance of large continental interiors ⓘ |
| partOf |
Mesozoic Era
ⓘ
Triassic ⓘ
surface form:
Triassic Period
|
| positionInEra | middle epoch of the Triassic Period ⓘ |
| precedes | Late Triassic ⓘ |
| start | approximately 247.2 million years ago ⓘ |
| startUncertainty | ±1.0 million years ⓘ |
| subdividedInto |
Anisian
ⓘ
Ladinian ⓘ |
| timeScaleAuthority | International Commission on Stratigraphy ⓘ |
| usedIn |
International Chronostratigraphic Chart
ⓘ
surface form:
international 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 Triassic Description of subject: 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.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Early Triassic
this entity surface form:
Middle Triassic Series