Lochkovian Epoch

E538404

geologic epoch stratigraphic unit

The Lochkovian Epoch is the earliest subdivision of the Devonian Period, marking a time of significant diversification in early fish and terrestrial ecosystems.

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All labels observed (2)

Label	Occurrences
Lochkovian Stage	2
Lochkovian Epoch canonical	1

How this entity was disambiguated

This entity first appeared as the object of triple T5631599 — 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: Lochkovian Epoch
Context triple: [Pridoli Epoch, precedes, Lochkovian Epoch]

A. Lopingian Epoch
The Lopingian Epoch is the final subdivision of the Permian Period, marked by significant evolutionary changes and culminating in the largest mass extinction event in Earth's history.
B. Cisuralian Epoch
The Cisuralian Epoch is the earliest subdivision of the Permian, marking a time of significant diversification of terrestrial life and continued development of early amniotes following the late Paleozoic ice age.
C. Pridoli Epoch
The Pridoli Epoch is the final epoch of the Silurian Period, marking a transitional interval in Earth’s history just before the onset of the Devonian.
D. Siderian Period
The Siderian Period is the earliest division of the Paleoproterozoic, marked by widespread banded iron formation deposition and the initial rise of atmospheric oxygen on Earth.
E. Terreneuvian
The Terreneuvian is the earliest age of the Cambrian Period, marking the beginning of the Phanerozoic Eon and the widespread appearance of complex animal life in the fossil record.
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: Lochkovian Epoch
Target entity description: The Lochkovian Epoch is the earliest subdivision of the Devonian Period, marking a time of significant diversification in early fish and terrestrial ecosystems.

A. Lopingian Epoch
The Lopingian Epoch is the final subdivision of the Permian Period, marked by significant evolutionary changes and culminating in the largest mass extinction event in Earth's history.
B. Cisuralian Epoch
The Cisuralian Epoch is the earliest subdivision of the Permian, marking a time of significant diversification of terrestrial life and continued development of early amniotes following the late Paleozoic ice age.
C. Pridoli Epoch
The Pridoli Epoch is the final epoch of the Silurian Period, marking a transitional interval in Earth’s history just before the onset of the Devonian.
D. Siderian Period
The Siderian Period is the earliest division of the Paleoproterozoic, marked by widespread banded iron formation deposition and the initial rise of atmospheric oxygen on Earth.
E. Terreneuvian
The Terreneuvian is the earliest age of the Cambrian Period, marking the beginning of the Phanerozoic Eon and the widespread appearance of complex animal life in the fossil record.
F. None of above. chosen

Statements (43)

Predicate	Object
instanceOf	geologic epoch ⓘ stratigraphic unit ⓘ
chronostratigraphicEquivalent	Lochkovian Age NERFINISHED ⓘ
correspondsTo	Lower Devonian Series NERFINISHED ⓘ
end	410.8 million years ago ⓘ
endUncertainty	±2.8 million years ⓘ
environmentalContext	generally warm global climate ⓘ high sea levels ⓘ
follows	Pridoli Epoch NERFINISHED ⓘ
fossilAssemblagesCharacteristic	conodont faunas ⓘ early fish fossils ⓘ graptolite faunas ⓘ
geologicTimeScaleEon	Phanerozoic Eon NERFINISHED ⓘ
geologicTimeScaleEra	Paleozoic Era NERFINISHED ⓘ
ICSColorCode	Devonian standard color (greenish) ⓘ
lithostratigraphicCorrelation	Lochkov Formation in the Prague Basin NERFINISHED ⓘ
lowerBoundaryDefinedAt	Klonk Section NERFINISHED ⓘ
lowerBoundaryDefinedBy	first appearance datum of the graptolite Monograptus uniformis ⓘ
lowerBoundaryLocation	Klonk, near Suchomasty, Czech Republic NERFINISHED ⓘ
lowerBoundaryType	Global Boundary Stratotype Section and Point NERFINISHED ⓘ
majorBiologicalEvent	development of early terrestrial ecosystems ⓘ diversification of early jawed fishes ⓘ diversification of early lobe-finned fishes ⓘ expansion of early terrestrial plant communities ⓘ radiation of early placoderms ⓘ
marineEcosystemFeature	diverse reef and shelf communities ⓘ
namedAfter	Lochkov NERFINISHED ⓘ
namedFor	Lochkov, Prague, Czech Republic NERFINISHED ⓘ
partOf	Devonian Period NERFINISHED ⓘ Early Devonian Epoch NERFINISHED ⓘ
plantEvolutionSignificance	spread of early vascular plants onto land ⓘ
positionInDevonian	earliest epoch of the Devonian ⓘ
precedes	Pragian Epoch NERFINISHED ⓘ
start	419.2 million years ago ⓘ
startUncertainty	±3.2 million years ⓘ
stratigraphicRank	epoch ⓘ
timeScale	International Commission on Stratigraphy NERFINISHED ⓘ
upperBoundaryDefinedBy	first appearance datum of the conodont Eognathodus sulcatus ⓘ first appearance datum of the conodont Latericriodus steinachensis ⓘ
upperBoundaryType	Global Boundary Stratotype Section and Point NERFINISHED ⓘ
usedIn	chronostratigraphy ⓘ geologic mapping ⓘ paleontological correlation ⓘ

How these facts were elicited

Referenced by (3)

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

Pridoli Epoch → precedes → Lochkovian Epoch ⓘ

Lochkovian → contains → Lochkovian Epoch ⓘ

this entity surface form: Lochkovian Stage

Global Boundary Stratotype Section and Point at Klonk, Czech Republic → marksBaseOf → Lochkovian Epoch ⓘ