Lochkovian
419.62 ± 1.36 – 413.02 ± 1.91 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Chronology
−420—–−415—–−410—–−405—–−400—–−395—–−390—–−385—–−380—–−375—–−370—–−365—–−360—–PaleozoicDevonianCMEarlyMidLateELochkovianPragianEmsianEifelianGivetianFrasnianFamennianTournaisianSPřídolí←Hangenberg event, Famennian glaciation←Kellwasser event (Late Devonian mass extinction)←Widespread shrubs & trees←Hunsrück fauna←Rhynie chertSubdivision of the Devonian according to the ICS, as of 2024 Vertical axis scale: Millions of years ago
−420—–−415—–−410—–−405—–−400—–−395—–−390—–−385—–−380—–−375—–−370—–−365—–−360—– · PaleozoicDevonianCMEarlyMidLateELochkovianPragianEmsianEifelianGivetianFrasnianFamennianTournaisianSPřídolí · ←Hangenberg event, Famennian glaciation←Kellwasser event (Late Devonian mass extinction)←Widespread shrubs & trees←Hunsrück fauna←Rhynie chert
←Hangenberg event, Famennian glaciation ←Widespread shrubs & trees
Subdivision of the Devonian according to the ICS, as of 2024 Vertical axis scale: Millions of years ago
Etymology
Name formalityFormal
Name ratified1985
Usage information
Regional usageGlobal (ICS) Time scale(s) usedICS Time Scale
Definition
Time span formalityFormal
Lower boundary definitionFAD of the graptolite Monograptus uniformis Lower boundary GSSPKlonk, Prague, Czech Republic 49°51′18″N 13°47′31″E/49.8550°N 13.7920°E/ 49.8550; 13.7920 Lower GSSP ratified1972
Upper boundary definitionFAD of the conodonts Eognathodus sulcatus and Latericriodus steinachensis Morph beta Upper boundary GSSPVelká Chuchle quarry, Velká Chuchle, Prague, Czech Republic 50°00′53″N 14°22′21″E/50.0147°N 14.3726°E/ 50.0147; 14.3726 Upper GSSP ratified1989