Hangenberg black shales
E415308
The Hangenberg black shales are organic-rich Late Devonian sedimentary deposits that record the environmental and oceanographic upheavals associated with the Hangenberg extinction event.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Hangenberg black shales canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4145623 — 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: Hangenberg black shales Context triple: [Late Devonian extinction, hasStratigraphicMarker, Hangenberg black shales]
-
A.
Solnhofen Limestone
Solnhofen Limestone is a famous Late Jurassic lithographic limestone formation in Bavaria, Germany, renowned for its exceptionally well-preserved fossils, including the iconic Archaeopteryx.
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B.
Burgess Shale fossil lagerstätte
The Burgess Shale fossil lagerstätte is a renowned Middle Cambrian rock formation in the Canadian Rockies famous for its exceptionally well-preserved soft-bodied fossils that reveal the diversity of early animal life.
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C.
Rhynie Chert fossil locality
The Rhynie Chert fossil locality is a famous Early Devonian site in Scotland renowned for its exceptionally preserved early land plants, arthropods, and microorganisms that provide key insights into the evolution of terrestrial ecosystems.
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D.
Hettange-Grande Formation
The Hettange-Grande Formation is an Early Jurassic (Hettangian) sedimentary rock unit in northeastern France that serves as the global stratotype (type section) for the base of the Jurassic System.
-
E.
Claron Formation
The Claron Formation is a geologic rock unit of colorful limestones and mudstones best known for forming the striking hoodoos and cliffs of Bryce Canyon and other parts of the Paunsaugunt Plateau in southern Utah.
- 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: Hangenberg black shales Target entity description: The Hangenberg black shales are organic-rich Late Devonian sedimentary deposits that record the environmental and oceanographic upheavals associated with the Hangenberg extinction event.
-
A.
Solnhofen Limestone
Solnhofen Limestone is a famous Late Jurassic lithographic limestone formation in Bavaria, Germany, renowned for its exceptionally well-preserved fossils, including the iconic Archaeopteryx.
-
B.
Burgess Shale fossil lagerstätte
The Burgess Shale fossil lagerstätte is a renowned Middle Cambrian rock formation in the Canadian Rockies famous for its exceptionally well-preserved soft-bodied fossils that reveal the diversity of early animal life.
-
C.
Rhynie Chert fossil locality
The Rhynie Chert fossil locality is a famous Early Devonian site in Scotland renowned for its exceptionally preserved early land plants, arthropods, and microorganisms that provide key insights into the evolution of terrestrial ecosystems.
-
D.
Hettange-Grande Formation
The Hettange-Grande Formation is an Early Jurassic (Hettangian) sedimentary rock unit in northeastern France that serves as the global stratotype (type section) for the base of the Jurassic System.
-
E.
Claron Formation
The Claron Formation is a geologic rock unit of colorful limestones and mudstones best known for forming the striking hoodoos and cliffs of Bryce Canyon and other parts of the Paunsaugunt Plateau in southern Utah.
- F. None of above. chosen
Statements (44)
| Predicate | Object |
|---|---|
| instanceOf |
black shale
ⓘ
sedimentary rock unit ⓘ stratigraphic unit ⓘ |
| associatedEvent |
Frasnian–Famennian boundary
ⓘ
surface form:
Hangenberg crisis
Late Devonian extinction ⓘ
surface form:
Hangenberg extinction event
|
| chronostratigraphicRole |
marker horizon for the Hangenberg event
ⓘ
used for interbasinal correlation of the Devonian–Carboniferous boundary ⓘ |
| color | black ⓘ |
| depositionalEnvironment |
basinal
ⓘ
dysoxic to anoxic seafloor conditions ⓘ marine ⓘ |
| economicSignificance | potential source rock for hydrocarbons in some basins ⓘ |
| formationProcess |
deposited during intervals of reduced bottom-water oxygenation
ⓘ
formed under conditions of enhanced preservation of organic matter ⓘ |
| fossilContent |
contains conodonts
ⓘ
contains microfossils indicative of stressed marine ecosystems ⓘ contains palynomorphs ⓘ |
| geochemicalCharacteristic |
enriched in redox-sensitive trace metals
ⓘ
high total organic carbon content ⓘ often show positive excursions in organic carbon isotopes ⓘ |
| geographicDistribution |
recorded in multiple Late Devonian basins worldwide
ⓘ
reported from North African basins ⓘ reported from North American basins ⓘ well documented in European sections ⓘ |
| geologicAge |
Famennian stage
ⓘ
surface form:
Famennian
Late Devonian ⓘ |
| lithology |
fine-grained siliciclastic sedimentary rock
ⓘ
organic-rich shale ⓘ |
| oxygenationIndicator | lack of bioturbation indicates low-oxygen bottom waters ⓘ |
| paleoenvironmentalSignificance |
evidence for global carbon cycle perturbations
ⓘ
evidence for widespread marine anoxia ⓘ record environmental upheavals at the end of the Devonian ⓘ record oceanographic changes associated with the Hangenberg extinction event ⓘ |
| relatedTo |
Hangenberg Sandstone
ⓘ
Hangenberg event beds ⓘ |
| researchUse |
used to investigate global sea-level changes at the Devonian–Carboniferous transition
ⓘ
used to reconstruct paleo-redox conditions ⓘ used to study Late Devonian mass extinction dynamics ⓘ |
| sedimentaryStructure | typically laminated ⓘ |
| stratigraphicContext | part of the Hangenberg Event succession in many sections ⓘ |
| stratigraphicPosition |
overlain by early Carboniferous strata
ⓘ
uppermost Devonian ⓘ |
| temporalRelation |
associated with the Devonian–Carboniferous boundary
ⓘ
followed the Kellwasser events of the Late Devonian ⓘ |
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: Hangenberg black shales Description of subject: The Hangenberg black shales are organic-rich Late Devonian sedimentary deposits that record the environmental and oceanographic upheavals associated with the Hangenberg extinction event.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.