Frasnian–Famennian boundary
E1193142
UNEXPLORED
The Frasnian–Famennian boundary marks a major Late Devonian mass extinction interval characterized by severe global environmental upheavals and widespread marine biodiversity loss.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Frasnian–Famennian boundary canonical | 1 |
| Hangenberg crisis | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T16081905 — 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: Frasnian–Famennian boundary Context triple: [Kellwasser events, associatedWith, Frasnian–Famennian boundary]
-
A.
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.
-
B.
Emsian–Eifelian boundary
The Emsian–Eifelian boundary marks the internationally recognized transition between the Early and Middle Devonian periods in the geologic timescale.
-
C.
Hangenberg black shales
The Hangenberg black shales are organic-rich Late Devonian sedimentary deposits that record the environmental and oceanographic upheavals associated with the Hangenberg extinction event.
-
D.
Furongian
Furongian is the late epoch of the Cambrian Period, marking the final stage of early Paleozoic marine life diversification before the Ordovician.
-
E.
Imbrian period
The Imbrian period is a major lunar geologic era characterized by extensive mare volcanism and large impact basins that shaped much of the Moon’s visible surface.
- 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: Frasnian–Famennian boundary Target entity description: The Frasnian–Famennian boundary marks a major Late Devonian mass extinction interval characterized by severe global environmental upheavals and widespread marine biodiversity loss.
-
A.
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.
-
B.
Emsian–Eifelian boundary
The Emsian–Eifelian boundary marks the internationally recognized transition between the Early and Middle Devonian periods in the geologic timescale.
-
C.
Hangenberg black shales
The Hangenberg black shales are organic-rich Late Devonian sedimentary deposits that record the environmental and oceanographic upheavals associated with the Hangenberg extinction event.
-
D.
Furongian
Furongian is the late epoch of the Cambrian Period, marking the final stage of early Paleozoic marine life diversification before the Ordovician.
-
E.
Imbrian period
The Imbrian period is a major lunar geologic era characterized by extensive mare volcanism and large impact basins that shaped much of the Moon’s visible surface.
- F. None of above. chosen
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Hangenberg crisis