third epoch of the Jurassic Period
Subdivision of the Jurassic according to the ICS, as of 2024. Vertical axis scale: Millions of years ago
Etymology Chronostratigraphic nameUpper Jurassic Geochronological nameLate Jurassic Name formalityFormal Usage information Celestial bodyEarth Regional usageGlobal (ICS) Time scale(s) usedICS Time Scale Definition Chronological unitEpoch Stratigraphic unitSeries Time span formalityFormal Lower boundary definitionNot formally defined Lower boundary definition candidatesHorizon of the Ammonite Cardioceras redcliffense. Lower boundary GSSP candidate section(s) Redcliff Point, Dorset, UK
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).