Hauterivian

The Hauterivian is, in the geologic timescale, an age in the Early Cretaceous Epoch or a stage in the Lower Cretaceous Series. It spans the time between 132.6 ± 2 Ma and 125.77 (million years ago). The Hauterivian is preceded by the Valanginian and succeeded by the Barremian.^[3]

Hauterivian
~132.6 – ~125.77 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Chronology
−140 — – −130 — – −120 — – −110 — – −100 — – −90 — – −80 — – −70 — – M e s o z o i c C Z J C r e t a c e o u s P g L J E a r l y L a t e P C Tithonian Berriasian Valanginian Hauterivian Barremian Aptian Albian Cenoman. Turonian Coniacian Santonian Campanian Maastricht. Danian       ← K-Pg mass extinction Subdivision of the Cretaceous according to the ICS, as of 2022.^[1] Vertical axis scale: millions of years ago.
Etymology
Name formality	Formal
Usage information
Celestial body	Earth
Regional usage	Global (ICS)
Time scale(s) used	ICS Time Scale
Definition
Chronological unit	Age
Stratigraphic unit	Stage
Time span formality	Formal
Lower boundary definition	FAD of the Ammonite genus Acanthodiscus
Lower boundary GSSP	La Charce, Drôme, France 44°28′10″N 5°26′37″E / 44.4694°N 5.4437°E / 44.4694; 5.4437
Lower GSSP ratified	December 2019^[2]
Upper boundary definition	Not formally defined
Upper boundary definition candidates	FAD of the Spitidiscus hugii-Spitidiscus vandeckii Ammonite group
Upper boundary GSSP candidate section(s)	Río Argos, Caravaca de la Cruz, Murcia Province, Spain

Stratigraphic definitions

The Hauterivian was introduced in scientific literature by Swiss geologist Eugène Renevier in 1873. It is named after the Swiss town of Hauterive at the shore of Lake Neuchâtel.

The base of the Hauterivian is defined as the place in the stratigraphic column where the ammonite genus Acanthodiscus first appears. A reference profile for the base (a GSSP) was officially ratified by the International Union of Geological Sciences in December of 2019, and is placed in La Charce, France.^[2] The top of the Hauterivian (the base of the Barremian) is at the first appearance of ammonite species Spitidiscus hugii.

In the ammonite biostratigraphy of the Tethys domain, the Hauterivian contains seven ammonite biozones:

• zone of Pseudothurmannia ohmi
• zone of Balearites balearis
• zone of Plesiospitidiscus ligatus
• zone of Subsaynella sayni
• zone of Lyticoceras nodosoplicatus
• zone of Crioceratites loryi
• zone of Acanthodiscus radiatus

References

Notes

1. International Commission on Stratigraphy. "ICS - Chart/Time Scale". www.stratigraphy.org.
2. Mutterlose, Jörg; Rawson, Peter; Reboulet, Stéphane; Baudin, François; Bulot, Luc; Emmanuel, Laurent; Gardin, Silvia; Martinez, Mathieu; Renard, Maurice (September 2020). "The Global Boundary Stratotype Section and Point (GSSP) for the base of the Hauterivian Stage (Lower Cretaceous), La Charce, southeast France". Episodes. 44 (2): 129–150. doi:10.18814/epiiugs/2020/020072. Retrieved 24 December 2020.
3. See Gradstein et al. (2004) for a detailed geologic timescale

Literature

• Gradstein, F.M.; Ogg, J.G. & Smith, A.G.; (2004): A Geologic Time Scale 2004, Cambridge University Press.

External links

• GeoWhen Database - Hauterivian
• Mid-Cretaceous timescale, at the website of the subcommission for stratigraphic information of the ICS
• , at the website of Norges Network of offshore records of geology and stratigraphy
• Hauterivian Microfossils: 25+ images of Foraminifera