Tithonian
The uppermost Jurassic age and corresponding stage, following the Kimmeridgian and preceding the Cretaceous Berriasian.
Language and route: German scientific Tithonische Stufe, derived from Greek mythology. Greek mythological name Τιθωνός (Tithōnós, Tithonus) → German geological Tithonian in Oppel’s 1865 proposal → international English Tithonian.
Literal gloss: of Tithonus; dawn-of-Cretaceous allusion
The name and its history
Albert Oppel · 1865
- What does the word literally mean?
- Tithonus, connected mythologically with Eos, ‘dawn’.
- What did the original author mean?
- Oppel (1865) named a fossil-defined uppermost Jurassic succession by mythical allusion to the immediately following Cretaceous, deliberately departing from the common locality-based naming practice.
- Why was the name needed?
- The older regional Portlandian and other uppermost Jurassic divisions could not be reliably transferred across Tethyan, Boreal and other faunal provinces; a stage anchored by fossil associations was needed.
- What evidence supported the original concept?
- Oppel used the succession of ammonite faunas across continental European sections; his purpose and original wording have been reviewed by later stratigraphers but his full original pages have not been independently transcribed for this project.
- How has geology changed the concept?
- The official Tithonian lacks a ratified basal GSSP in the consulted 2026 Jurassic Subcommission status. There is also a longstanding argument about how to correlate the Jurassic–Cretaceous boundary with regional stages such as Portlandian and Volgian.
Further historical context
The Tithonian contrasts with geographic stage names: Oppel chose a literary allusion rather than a type locality. His original proposal was associated with a distinct ammonite succession in European sections.
The term was initially criticised because it did not point to a locality or single stratotype. Competing schemes for the terminal Jurassic have subsequently been reconciled only imperfectly.
The mythology is a mnemonic for its position at the end of the Jurassic, not an original palaeobiological theory that new life dawned precisely at its lower boundary.
Editorial qualification
Do not pretend a ratified Tithonian GSSP exists or present one modern correlation proposal as universally accepted.
Related names
Kimmeridgian · Jurassic · Cretaceous · Ammonite · GSSP
Sources
- ICS International Chronostratigraphic Chart, 2026/06 — Official current ranks and names; ages are subject to revision
- Ogg et al. (2020), history of the Tithonian and Oppel’s 1865 usage — Oppel’s mythological naming analogy, faunal basis and competing regional stages
- R. Énay (2019), Jurassic/Cretaceous boundary and Oppel’s original Tithonian — Secondary study quoting and assessing Oppel (1865), p. 535; interpretation remains debated
- ICS Subcommission on Jurassic Stratigraphy, stage working groups — Individual stage boundary status and GSSP locations