Pliensbachian

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Pliensbachian
192.9 ± 0.3 – 184.2 ± 0.3 Ma
Chronology

The Pliensbachian is an

Ma and 184.2 ±0.3 Ma (million years ago).[4] The Pliensbachian is preceded by the Sinemurian and followed by the Toarcian.[5]

The Pliensbachian ended with the

Charmouthian regional stage of North America
.

Stratigraphic definitions

The Pliensbachian takes its name from the hamlet of

Swabian Alb, some 30 km east of Stuttgart in Germany. The name was introduced into scientific literature by German palaeontologist Albert Oppel
in 1858.

The base of the Pliensbachian is at the first appearances of the ammonite species

GSSP).[6]

The top of the Pliensbachian (the base of the Toarcian Stage) is at the first appearance of ammonite genus Eodactylites.

Biostratigraphy

Pleuroceras spinatum Museum of Toulouse

The Pliensbachian contains five ammonite biozones in the boreal domain:

In the Tethys domain, the Pliensbachian contains six biozones:

References

Notes

  1. ^ "International Chronostratigraphic Chart" (PDF). International Commission on Stratigraphy.
  2. doi:10.18814/epiiugs/2006/v29i2/003
    . Retrieved 23 December 2020.
  3. hdl:10261/140775
    .
  4. ISBN 978-0-7566-9910-9
    .
  5. ^ See Gradstein et al. (2004) for a detailed geologic timescale
  6. ^ Meister et al. (2006)

Literature

  • Gradstein, F.M.; Ogg, J.G. & Smith, A.G.; 2004: A Geologic Time Scale 2004, Cambridge University Press.
  • Howart, M.K.; 2002: The Lower Lias of Robin Hood's Bay, Yorkshire, and the work of Leslie Bairstow, Bulletin of the Natural History Museum. Geology Series 58, p. 81–152, Cambridge University Press, The Natural History Museum, (abstract)
  • Meister, C.; Aberhan, M.; Blau, J.; Dommergues, J.-L.; Feist-Burkhardt, S.; Hailwood, E.A.; Hart, M.; Hesselbo, S.P.; Hounslow, M.W.; Hylton, M.; Morton, N.; Page, K & Price, G.D.; 2006: The Global Boundary Stratotype Section and Point (GSSP) for the base of the Pliensbachian Stage (Lower Jurassic), Wine Haven, Yorkshire, UK, Episodes 29(2), pp. 93–106.
  • Oppel, C.A.; 1856-1858: Die Juraformation Englands, Frankreichs und des südwestlichen Deutschlands: nach ihren einzelnen Gliedern engetheilt und verglichen, 857 pp., Ebner & Seubert, Stuttgart. (in German)

External links

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