Middle Miocene
E262870
The Middle Miocene is a subdivision of the Miocene Epoch characterized by significant global climatic shifts, including a major warming phase followed by cooling, and important stages in mammalian evolution and marine biodiversity.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Middle Miocene canonical | 3 |
| Middle Miocene Climate Transition | 1 |
| Middle Miocene Climatic Optimum | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2403609 — 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 Miocene Context triple: [Neogene, subdividedInto, Middle Miocene]
-
A.
Pliocene epoch
The Pliocene epoch was a geological time period roughly 5.3 to 2.6 million years ago marked by cooler global climates, the expansion of grasslands, and significant evolutionary developments among mammals and early hominins.
-
B.
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.
-
C.
Neogene
The Neogene is a geologic period of the Cenozoic Era characterized by significant climatic cooling, the diversification of mammals and birds, and the emergence and evolution of early hominins.
-
D.
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.
-
E.
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.
- 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 Miocene Target entity description: The Middle Miocene is a subdivision of the Miocene Epoch characterized by significant global climatic shifts, including a major warming phase followed by cooling, and important stages in mammalian evolution and marine biodiversity.
-
A.
Pliocene epoch
The Pliocene epoch was a geological time period roughly 5.3 to 2.6 million years ago marked by cooler global climates, the expansion of grasslands, and significant evolutionary developments among mammals and early hominins.
-
B.
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.
-
C.
Neogene
The Neogene is a geologic period of the Cenozoic Era characterized by significant climatic cooling, the diversification of mammals and birds, and the emergence and evolution of early hominins.
-
D.
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.
-
E.
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.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
climatic event
ⓘ
climatic event ⓘ geologic age ⓘ subdivision of the Miocene Epoch ⓘ |
| associatedWith |
changes in marine productivity
ⓘ
changes in upwelling systems ⓘ elevated atmospheric CO2 levels ⓘ reorganization of deep-water circulation ⓘ |
| characterizedBy |
changes in atmospheric CO2 levels
ⓘ
changes in marine biodiversity ⓘ changes in ocean circulation ⓘ expansion of Antarctic ice sheets ⓘ global climatic shifts ⓘ global cooling ⓘ global warming ⓘ growth of Antarctic ice sheets ⓘ higher global temperatures than present ⓘ important stages in mammalian evolution ⓘ major warming phase ⓘ sea-level fluctuations ⓘ subsequent global cooling ⓘ |
| containsStage |
Langhian
ⓘ
Serravallian ⓘ |
| definedBy | International Commission on Stratigraphy ⓘ |
| endTime | approximately 11.6 million years ago ⓘ |
| follows | Early Miocene ⓘ |
| hasEvent |
Middle Miocene
self-linksurface differs
ⓘ
surface form:
Middle Miocene Climate Transition
Middle Miocene self-linksurface differs ⓘ
surface form:
Middle Miocene Climatic Optimum
|
| hasStratotype |
Global Boundary Stratotype Section and Point
ⓘ
surface form:
Global Boundary Stratotype Section and Point for the Langhian Stage
Global Boundary Stratotype Section and Point ⓘ
surface form:
Global Boundary Stratotype Section and Point for the Serravallian Stage
|
| importantFor |
diversification of apes
ⓘ
evolution of cetaceans ⓘ evolution of early hominoids ⓘ evolution of marine mammals ⓘ evolution of modern coral reef communities ⓘ evolution of pinnipeds ⓘ evolution of terrestrial mammals ⓘ radiation of many modern mammal families ⓘ |
| occursDuring |
Middle Miocene
self-linksurface differs
ⓘ
Middle Miocene self-linksurface differs ⓘ |
| partOf |
Cenozoic
ⓘ
surface form:
Cenozoic Era
Miocene ⓘ
surface form:
Miocene Epoch
Neogene ⓘ
surface form:
Neogene Period
|
| precedes | Late Miocene ⓘ |
| startTime | approximately 16.0 million years ago ⓘ |
| timeSpan | approximately 4.4 million years ⓘ |
| usedIn |
biostratigraphic correlation
ⓘ
paleoclimatology ⓘ paleontology ⓘ stratigraphy ⓘ |
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 Miocene Description of subject: The Middle Miocene is a subdivision of the Miocene Epoch characterized by significant global climatic shifts, including a major warming phase followed by cooling, and important stages in mammalian evolution and marine biodiversity.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Middle Miocene Climatic Optimum
this entity surface form:
Middle Miocene Climate Transition
subject surface form:
Middle Miocene Climatic Optimum
subject surface form:
Middle Miocene Climate Transition