Silurian–Devonian boundary
E1502789
UNEXPLORED
The Silurian–Devonian boundary marks a major geological time division about 419 million years ago, separating the end of the Silurian Period from the beginning of the Devonian Period and associated with significant evolutionary and environmental changes.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Silurian–Devonian boundary canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T21808545 — 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: Silurian–Devonian boundary Context triple: [Klonk Section, defines, Silurian–Devonian boundary]
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A.
Emsian–Eifelian boundary
The Emsian–Eifelian boundary marks the internationally recognized transition between the Early and Middle Devonian periods in the geologic timescale.
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B.
Frasnian–Famennian boundary
The Frasnian–Famennian boundary marks a major Late Devonian mass extinction interval characterized by severe global environmental upheavals and widespread marine biodiversity loss.
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C.
Carboniferous–Permian boundary
The Carboniferous–Permian boundary marks the internationally recognized transition between the late Paleozoic Carboniferous and Permian periods, defined stratigraphically by a Global Boundary Stratotype Section and Point (GSSP).
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D.
Givetian–Frasnian boundary
The Givetian–Frasnian boundary marks the internationally recognized stratigraphic transition between the Middle and Late Devonian periods, defined by specific fossil and sedimentary changes in the geologic record.
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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: Silurian–Devonian boundary Target entity description: The Silurian–Devonian boundary marks a major geological time division about 419 million years ago, separating the end of the Silurian Period from the beginning of the Devonian Period and associated with significant evolutionary and environmental changes.
-
A.
Emsian–Eifelian boundary
The Emsian–Eifelian boundary marks the internationally recognized transition between the Early and Middle Devonian periods in the geologic timescale.
-
B.
Frasnian–Famennian boundary
The Frasnian–Famennian boundary marks a major Late Devonian mass extinction interval characterized by severe global environmental upheavals and widespread marine biodiversity loss.
-
C.
Carboniferous–Permian boundary
The Carboniferous–Permian boundary marks the internationally recognized transition between the late Paleozoic Carboniferous and Permian periods, defined stratigraphically by a Global Boundary Stratotype Section and Point (GSSP).
-
D.
Givetian–Frasnian boundary
The Givetian–Frasnian boundary marks the internationally recognized stratigraphic transition between the Middle and Late Devonian periods, defined by specific fossil and sedimentary changes in the geologic record.
-
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
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.