Givetian–Frasnian boundary

E540927

Devonian boundary chronostratigraphic boundary stage 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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Observed surface forms (1)

Surface form	Occurrences
Frasnian stage	1

Statements (30)

Predicate	Object
instanceOf	Devonian boundary ⓘ chronostratigraphic boundary ⓘ stage boundary ⓘ
appliesTo	Devonian marine sedimentary successions ⓘ
belongsTo	Phanerozoic Eonothem NERFINISHED ⓘ
characterizedBy	changes in marine faunas ⓘ changes in reef ecosystems ⓘ lithostratigraphic changes ⓘ
correspondsTo	transition from Middle to Late Devonian time ⓘ
definedBy	biostratigraphic criteria ⓘ conodont biozones ⓘ fossil assemblage changes ⓘ sedimentary changes ⓘ
follows	Givetian Stage NERFINISHED ⓘ
hasRank	stage boundary within the Devonian ⓘ
hasStratigraphicSignificance	global correlation of Devonian stages ⓘ
isDefinedAt	specific stratotype section ⓘ
isReferenceFor	correlation of Middle and Late Devonian strata ⓘ
isWithin	Devonian Period NERFINISHED ⓘ Paleozoic Era NERFINISHED ⓘ
marksTransitionBetween	Late Devonian NERFINISHED ⓘ Middle Devonian NERFINISHED ⓘ
partOf	Devonian System NERFINISHED ⓘ
precedes	Frasnian Stage NERFINISHED ⓘ
recognizedAs	international stratotype boundary ⓘ
recognizedBy	International Commission on Stratigraphy NERFINISHED ⓘ
separates	Frasnian Stage NERFINISHED ⓘ Givetian Stage NERFINISHED ⓘ
usedIn	global chronostratigraphic scale ⓘ global geologic time scale ⓘ

Referenced by (2)

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

Middle Devonian → endBoundary → Givetian–Frasnian boundary ⓘ

Kellwasser events → occurredDuring → Givetian–Frasnian boundary ⓘ

this entity surface form: Frasnian stage