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Danian

Subdivision of the Paleogene according to the ICS, as of 2024.Vertical axis scale: Millions of years agoFormerly part ofTertiaryPeriod/SystemEtymologyName formalityFormalUsage informationCelestial bodyEarthRegional usageGlobal (ICS)Time scale(s) usedICS Time ScaleDefinitionChronological unitAgeStratigraphic unitStageTime span formalityFormalLower boundary definitionIridium enriched layer associated with a major meteorite impact and subsequent K–Pg extinction eventLower boundary GSSPEl Kef Section, El Kef, Tunisia36°09′13″N8°38′55″E / 36.1537°N 8.6486°E / 36.1537; 8.6486Lower GSSP ratified1991Upper boundary definitionOnset of sea-level drop and carbon isotope shiftUpper boundary GSSPZumaia Section, Basque Country, Spain43°17′57″N2°15′40″W / 43.2992°N 2.2610°W / 43.2992; -2.2610Upper GSSP ratified2008The Danian is the oldest age or lowest stage of the Paleocene Epoch or Series, of the Paleogene Period or System, and of the Cenozoic Era or Erathem.

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