Cisuralian Epoch
E392438
The Cisuralian Epoch is the earliest subdivision of the Permian, marking a time of significant diversification of terrestrial life and continued development of early amniotes following the late Paleozoic ice age.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Cisuralian Epoch canonical | 4 |
| Cisuralian Series | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T3843529 — 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: Cisuralian Epoch Context triple: [Permian Period, hasSubdivision, Cisuralian Epoch]
-
A.
Pridoli Epoch
The Pridoli Epoch is the final epoch of the Silurian Period, marking a transitional interval in Earth’s history just before the onset of the Devonian.
-
B.
Siderian Period
The Siderian Period is the earliest division of the Paleoproterozoic, marked by widespread banded iron formation deposition and the initial rise of atmospheric oxygen on Earth.
-
C.
Calymmian Period
The Calymmian Period is the earliest division of the Mesoproterozoic Era, marked by the stabilization and expansion of continental crust and the development of large sedimentary basins roughly 1.6 to 1.4 billion years ago.
-
D.
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.
-
E.
Oligocene Epoch
The Oligocene Epoch was a geologic time interval roughly 34 to 23 million years ago marked by global cooling, the expansion of grasslands, and significant evolution and diversification of mammals.
- 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: Cisuralian Epoch Target entity description: The Cisuralian Epoch is the earliest subdivision of the Permian, marking a time of significant diversification of terrestrial life and continued development of early amniotes following the late Paleozoic ice age.
-
A.
Pridoli Epoch
The Pridoli Epoch is the final epoch of the Silurian Period, marking a transitional interval in Earth’s history just before the onset of the Devonian.
-
B.
Siderian Period
The Siderian Period is the earliest division of the Paleoproterozoic, marked by widespread banded iron formation deposition and the initial rise of atmospheric oxygen on Earth.
-
C.
Calymmian Period
The Calymmian Period is the earliest division of the Mesoproterozoic Era, marked by the stabilization and expansion of continental crust and the development of large sedimentary basins roughly 1.6 to 1.4 billion years ago.
-
D.
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.
-
E.
Oligocene Epoch
The Oligocene Epoch was a geologic time interval roughly 34 to 23 million years ago marked by global cooling, the expansion of grasslands, and significant evolution and diversification of mammals.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
geologic epoch
ⓘ
subdivision of the Permian Period ⓘ |
| alsoKnownAs | Lower Permian Series ⓘ |
| associatedWith | post-glacial isostatic and eustatic sea-level changes ⓘ |
| characterizedBy |
abundant coal-bearing and red-bed continental deposits in some regions
ⓘ
continued radiation of early amniotes ⓘ development of early synapsid-dominated faunas ⓘ diversification of terrestrial ecosystems ⓘ expansion of arid and seasonally dry continental interiors ⓘ retreat of late Paleozoic continental ice sheets ⓘ |
| chronostratigraphicRank | series ⓘ |
| climate | transition from late Paleozoic ice age to generally warmer and drier conditions ⓘ |
| containsAge |
Artinskian Age
ⓘ
Asselian Age ⓘ Artinskian Age ⓘ
surface form:
Kungurian Age
Sakmarian Age ⓘ |
| earliestEpochOf | Permian Period ⓘ |
| end | approximately 272.3 million years ago ⓘ |
| eon | Phanerozoic Eon ⓘ |
| era | Paleozoic Era ⓘ |
| followedBy | Guadalupian Epoch ⓘ |
| follows |
Carboniferous period
ⓘ
surface form:
Late Carboniferous
Carboniferous period ⓘ
surface form:
Pennsylvanian Subperiod
|
| geochronologicRank | epoch ⓘ |
| lowerBoundaryDefinedBy | first appearance datum of the conodont Streptognathodus isolatus ⓘ |
| lowerBoundaryStratotype |
GSSP at Aidaralash Creek, Kazakhstan (base of Asselian)
ⓘ
surface form:
Global Stratotype Section and Point at Aidaralash Creek near Aqtöbe, Kazakhstan
|
| marineLife |
abundant brachiopods
ⓘ
ammonoids and other cephalopods ⓘ diverse crinoids and other echinoderms ⓘ diverse fusulinid foraminifera ⓘ |
| namedAfter | western slope of the Ural Mountains (Cis-Uralian region) ⓘ |
| notableFor | shift from coal-swamp ecosystems to more xeric terrestrial biomes ⓘ |
| paleogeography |
assembly and early evolution of the supercontinent Pangea
ⓘ
extensive interior continental basins ⓘ |
| partOf |
Paleozoic Era
ⓘ
Permian Period ⓘ |
| plantLife | expansion of seed ferns and conifers in drier habitats ⓘ |
| positionInPermian | lower (earliest) series of the Permian ⓘ |
| recognizedBy | International Commission on Stratigraphy ⓘ |
| standardGlobalUse | international chronostratigraphic chart ⓘ |
| start | approximately 298.9 million years ago ⓘ |
| system |
Permian Period
ⓘ
surface form:
Permian System
|
| terrestrialLife |
decline of many Carboniferous lycopsid swamp floras
ⓘ
diverse early reptiles (sauropsid amniotes) ⓘ early pelycosaur-grade synapsids ⓘ early therapsid precursors ⓘ |
| timeSpan | about 26.6 million years ⓘ |
| upperBoundaryApproximateEvent | significant faunal turnover in marine invertebrates ⓘ |
| upperBoundaryDefinedBy | base of the Guadalupian Epoch ⓘ |
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: Cisuralian Epoch Description of subject: The Cisuralian Epoch is the earliest subdivision of the Permian, marking a time of significant diversification of terrestrial life and continued development of early amniotes following the late Paleozoic ice age.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.