Oxfordian age

EtymologyName formalityFormalUsage informationCelestial bodyEarthRegional usageGlobal (ICS)Time scale(s) usedICS Time ScaleDefinitionChronological unitAgeStratigraphic unitStageTime span formalityFormalLower boundary definitionFAD of ammonite species Lower boundary definition candidatesHorizon of the AmmoniteCardioceras redcliffense.Lower boundary GSSP candidate section(s)

• Redcliff Point, Dorset, UK
• , Provence, France

Upper boundary definitionFAD of the AmmonitePictonia bayleiUpper boundary GSSPFlodigarry, Skye, Scotland, UK
57°39′40″N6°14′44″W / 57.6610°N 6.2455°W / 57.6610; -6.2455Upper GSSP ratified2021

The Oxfordian is, in the ICS' geologic timescale, the earliest age of the Late JurassicEpoch, or the lowest stage of the Upper JurassicSeries. It spans the time between 161.5 ± 1.0 Ma and 154.8 ± 0.8 Ma (million years ago). The Oxfordian is preceded by the Callovian and is followed by the Kimmeridgian.