Late Triassic
E196698
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.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Late Triassic canonical | 6 |
| Late Triassic Epoch | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1758845 — 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: Late Triassic Context triple: [Early Jurassic, follows, Late Triassic]
-
A.
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.
-
B.
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.
-
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.
Permian Period
The Permian Period was the final period of the Paleozoic Era, marked by the diversification of reptiles and the largest mass extinction in Earth's history at its close.
-
E.
Mesozoic Era
The Mesozoic Era was a major geological era, often called the "Age of Reptiles," during which dinosaurs dominated the land and the supercontinent Pangaea broke apart into modern continents.
- 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: Late Triassic Target entity description: 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.
-
A.
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.
-
B.
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.
-
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.
Permian Period
The Permian Period was the final period of the Paleozoic Era, marked by the diversification of reptiles and the largest mass extinction in Earth's history at its close.
-
E.
Mesozoic Era
The Mesozoic Era was a major geological era, often called the "Age of Reptiles," during which dinosaurs dominated the land and the supercontinent Pangaea broke apart into modern continents.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
epoch
ⓘ
geologic period ⓘ |
| chronostratigraphicUnit | Upper Triassic Series ⓘ |
| climate |
generally warm
ⓘ
seasonally arid in many regions ⓘ |
| contains |
Carnian
ⓘ
Norian ⓘ Rhaetian ⓘ |
| dominantTerrestrialVertebrates |
early dinosaurs
ⓘ
non-dinosaurian archosaurs ⓘ therapsids in some regions ⓘ |
| endBoundary | Rhaetian age ⓘ |
| endTime | approximately 201 million years ago ⓘ |
| flora |
conifers
ⓘ
ginkgophytes ⓘ seed ferns ⓘ |
| followedBy |
Hettangian stage
ⓘ
surface form:
Hettangian
|
| follows | Middle Triassic ⓘ |
| geochronologicUnit |
Late Triassic
self-linksurface differs
ⓘ
surface form:
Late Triassic Epoch
|
| majorEvent |
diversification of early dinosaurs
ⓘ
diversification of marine reptiles ⓘ end-Triassic mass extinction ⓘ evolution of first true crocodile-line archosaurs ⓘ origin and diversification of pterosaurs ⓘ radiation of early mammals ⓘ |
| marineLife |
ammonoids
ⓘ
bivalves ⓘ conodonts ⓘ ichthyosaurs ⓘ plesiosaurs (late in the interval) ⓘ |
| massExtinction | end-Triassic extinction event ⓘ |
| massExtinctionConsequence | ecological expansion of dinosaurs in the Jurassic ⓘ |
| massExtinctionImpact |
decline of many archosaur groups
ⓘ
severe losses in marine faunas ⓘ |
| massExtinctionSeverity | one of the five largest Phanerozoic mass extinctions ⓘ |
| massExtinctionTiming | at or near the Triassic–Jurassic boundary ⓘ |
| ocean |
Panthalassa Ocean dominant
ⓘ
Tethys Ocean ⓘ
surface form:
Tethys Ocean extensive in low latitudes
|
| paleogeography | supercontinent Pangaea largely intact ⓘ |
| partOf |
Mesozoic Era
ⓘ
Triassic ⓘ |
| precededBy |
Anisian
ⓘ
Ladinian ⓘ |
| precedes | Early Jurassic ⓘ |
| startBoundary | Carnian age ⓘ |
| startTime | approximately 237 million years ago ⓘ |
| stratigraphicBoundaryDefinition |
Global Boundary Stratotype Section and Point
ⓘ
surface form:
Global Boundary Stratotype Section and Point (GSSP) used for stage limits
|
| timeScale | Mesozoic Era ⓘ |
| usedIn | International Chronostratigraphic Chart ⓘ |
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: Late Triassic Description of subject: 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.
Referenced by (7)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Late Triassic Epoch