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GSSP for Campanian Stage

Definition:

The base of the Campanian Stage is defined at level 221.53 m in the Bottaccione Gorge Section at Gubbio, Umbria-Marche Basin, Italy. It coincides with the magnetic polarity reversal from Chron C34n (top of the Long Cretaceous Normal Polarity-Chron) to Chron C33r.

Location:

The Bottaccione Gorge Section for the Campanian GSSP is located 1.4 km NNE of Gubbio, Umbria-Marche Basin, Italy. The GSSP section is located at a latitude of 43.36267° N and a longitude of 12.58283° E. The boundary interval extends from 210.79 - 233.63 m. 		GSSP for Campanian Stage


Sedimentology:

The GSSP section is 22.84 m thick and consists of well-bedded pink to red and white bioturbated limestones ranging from 6 - 80 cm. Pink to reddish and grey to greenish-grey chert nodules and limestone beds (3 - 6cm thick) occur throughout.


Primary Markers:

The base of the Campanian Stage coincides with the base of magnetic polarity Chron C33r.

Secondary Markers:

The base of magnetic polarity Chron C33r lies between the FO of calcareous nannofossil Aspidolithus parcus parcus at the 220.50 m level and the LO of planktonic foraminifer Dicarinella asymetrica.
Markers across the Santonian - Campanian Boundary (primary and auxiliary markers):
In stratigraphic order from oldest (213.3 m) to youngest (Bed 73):

Meters Markers
213.30 m First occurrence (FO) of planktonic foraminifer Globotruncana neotricarinata
215.4 - 216.6 m Late Santonian Event (LSE-a) positive excursion in δ13C
217.0 - 218.8 m Late Santonian Event (LSE-b) positive excursion in δ13C
217.55 m FO of planktonic foraminifer Contusotruncana patelliformis
218.92 m Last occurrence (LO) of planktonic foraminifers Marginotruncana tarfayaensis, Marginotruncana pseudomarginata
219.10 m FO of calcareous nannofossil Arkhangelskiella cymbiformis
219.5 m FO of calcareous nannofossil Aspidolithus parcus expansus
220.2 m LO of planktonic foraminifer Dicarinella concavata
220.5 m FO of calcareous nannofossil Aspidolithus parcus parcus
221.53 m Primary marker, base of Chron C33r, base of Campanian Stage
221.72 m LO of planktonic foraminifer Dicarinella asymetrica and Sigalia sp.
222.05 m FO of planktonic foraminifer Globotruncanita atlantica
224.60 m First common occurrence of calcareous nannofossil Aspidolithus parcus parcus
229 m FO of calcareous nannofossil Aspidolithus parcus constrictus
230.98 m LO of planktonic foraminifers Marginotruncana spp.


Correlation Events:

Base of Chron C33r

Other Locations around the World:

Auxiliary sections are Seaford Head, Sussex, UK is developed in white chalk facies and was relatively close to the basin margin. Biocieniec, near Warsaw, Poland is a thin section with marly facies with an increase in proximity to the shoreline through time. Postalm, Austria developed in a rhythmically-bedded, deep-water hemipelagic environment. Smoky Hill Chalk Member of N Kansas, USA is set in the Western Interior Seaway and developed in a marly chalk facies. Tepeyac Section in N Coahuela, Mexico.

References:

Gale, A. S., Batenburg, S., Coccioni, R., Dubicka, Z., Erba, E., Falzoni, F., Haggart, J., Hasegawa, T., Ifrim, C.,Jarvis, I., Jenkyns, H., Jurawska, A., Kennedy, J., Maron, M., Muttoni, G., Pearce, M., Petrizzo, M. R., Premoli-Silva, I., Thibault, N., Voigt, S., Wagreich, M., Walaszcyk, I., 2023. The Global Boundary Stratotype Section and Point (GSSP) of the Campanian Stage at Bottaccione (Gubbio, Italy) and its Auxiliary Sections: Seaford Head (UK), Bocieniec (Poland), Postalm (Austria), Smoky Hill, Kansas (U.S.A), Tepayac (Mexico). Episodes 46/3, p. 451 - 490.

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