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 |
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 ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.