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Serravallian

Subdivision of the Neogene according to the ICS, as of 2024.Vertical axis scale: Millions of years agoFormerly part ofTertiaryPeriod/SystemEtymologyGeochronological nameFormalUsage informationCelestial bodyEarthRegional usageGlobal (ICS)Time scale(s) usedICS Time ScaleDefinitionChronological unitAgeStratigraphic unitStageTime span formalityFormalLower boundary definitionMi3b Oxygen-isotopic event (Global cooling episode)Lower boundary GSSPRas il Pellegrin section, Fomm ir-Riħ Bay, Malta35°54′50″N14°20′10″E / 35.9139°N 14.3361°E / 35.9139; 14.3361Lower GSSP ratified2007Upper boundary definitionLAD of the HaptophyteDiscoaster kugleriUpper boundary GSSPMonte dei Corvi Beach section, Ancona, Italy43°35′12″N13°34′10″E / 43.5867°N 13.5694°E / 43.5867; 13.5694Upper GSSP ratified2003The Serravallian is, in the geologic timescale, an age or a stage in the middle MioceneEpoch/Series, which spans the time between 13.82 Ma and 11.63 Ma (million years ago).

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