Kellwasser horizons

E415307

black shale unit event bed geological horizon stratigraphic marker

The Kellwasser horizons are distinctive black shale layers in Late Devonian marine sediments that mark one of the major extinction pulses during the Late Devonian mass extinction.

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All labels observed (2)

Label	Occurrences
Kellwasser horizons canonical	2
Lower Kellwasser event	1

Statements (39)

Predicate	Object
instanceOf	black shale unit ⓘ event bed ⓘ geological horizon ⓘ stratigraphic marker ⓘ
age	Frasnian–Famennian boundary interval ⓘ
associatedWith	Late Devonian extinction ⓘ surface form: Frasnian–Famennian extinction event Late Devonian extinction ⓘ surface form: Late Devonian mass extinction crisis in stromatoporoids and corals ⓘ decline of reef-building organisms ⓘ extinction of many marine invertebrate taxa ⓘ
contains	laminated black shale ⓘ organic-rich mudstone ⓘ pyrite ⓘ
correlatesWith	global sea-level changes in the Late Devonian ⓘ widespread marine anoxia events ⓘ
discoveredIn	19th century ⓘ
environment	marine ⓘ
geochemicalSignature	enrichment in redox-sensitive trace metals ⓘ high total organic carbon ⓘ negative carbon isotope excursions ⓘ
geologicalPeriod	Late Devonian ⓘ
lithology	black shale ⓘ
marks	extinction pulse during the Late Devonian mass extinction ⓘ
namedAfter	Kellwassertal in the Harz Mountains, Germany ⓘ
occursIn	Europe ⓘ North America ⓘ global marine basins ⓘ
paleoenvironmentalInterpretation	anoxic bottom-water conditions ⓘ eutrophication of marine basins ⓘ
researchTopicIn	Devonian stratigraphy ⓘ mass extinction studies ⓘ paleoceanography ⓘ
significance	key marker for the Late Devonian biotic crisis ⓘ
stratigraphicPosition	uppermost Frasnian ⓘ
subdivision	Lower Kellwasser horizon ⓘ Upper Kellwasser horizon ⓘ
temporalRelation	immediately precede the Frasnian–Famennian boundary ⓘ
usedAs	biostratigraphic marker ⓘ chemostratigraphic marker ⓘ

Referenced by (3)

Full triples — surface form annotated when it differs from this entity's canonical label.

Late Devonian extinction → hasStratigraphicMarker → Kellwasser horizons ⓘ

Kellwasser events → hasPart → Kellwasser horizons ⓘ

this entity surface form: Lower Kellwasser event

Kellwasser events → recordedIn → Kellwasser horizons ⓘ