Campanian
{{Short description|Geologic age in the Late Cretaceous}}
{{About|the geological age|Campanian ignimbrite|Phlegraean Fields|the ancient people|Campanians|the dialect|Campanian dialect}}
{{Infobox geologic timespan
| name = Campanian
| color = Campanian
| time_start = 83.6
| time_start_uncertainty = 0.2
| time_end = 72.1
| time_end_uncertainty = 0.2
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| timeline = Cretaceous
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| name_formality = Formal
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| celestial_body = earth
| usage = Global (ICS)
| timescales_used = ICS Time Scale
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| chrono_unit = Age
| strat_unit = Stage
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| timespan_formality = Formal
| lower_boundary_def = Base of Chron C33r{{cite journal |last1=Jarvis |first1=Ian |display-authors = etal |title=Carbon isotopes, palynology and stratigraphy of the Santonian–Campanian boundary: The GSSP auxiliary sections, Seaford Head (England) and Bocieniec (Poland), and correlation between the Boreal and Tethyan realms |journal= Cretaceous Research|date=2023 |volume=143 |page=105415 |doi=10.1016/j.cretres.2022.105415 |bibcode=2023CrRes.14305415J |s2cid=253436620 |doi-access=free |hdl=10871/133015 |hdl-access=free }}
| lower_gssp_location = Bottaccione, Gubbio, Italy
| lower_gssp_accept_date = October 2022{{cite web |title=Campanian GSSP Ratified by IUGS |url=https://cretaceous.stratigraphy.org/news/campanian_gssp |website=Subcommission on Cretaceous Stratigraphy |publisher=International Commission on Stratigraphy |access-date=14 January 2023}}
| upper_boundary_def = Mean of 12 biostratigraphic criteria
| upper_gssp_location = Grande Carrière quarry, Landes, France
| upper_gssp_coords = {{Coord|43.6795|N|1.1133|W|display=inline}}
| upper_gssp_accept_date = February 2001{{cite journal|last=Odin|first=Gilles S.|author2=Michèle A. Lamaurelle |title=The global Campanian-Maastrichtian stage boundary|journal=Episodes|year=2001|volume=24|issue=4|pages=229–238|doi=10.18814/epiiugs/2001/v24i4/002|doi-access=free}}
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The Campanian is the fifth of six ages of the Late Cretaceous epoch on the geologic timescale of the International Commission on Stratigraphy (ICS). In chronostratigraphy, it is the fifth of six stages in the Upper Cretaceous Series. Campanian spans the time from 83.6 (± 0.2) to 72.1 (± 0.2) million years ago. It is preceded by the Santonian and it is followed by the Maastrichtian.{{cite book |editor1-last=Gradstein |editor1-first=F.M. |editor2-last=Ogg |editor2-first=J.G. |editor3-last=Smith |editor3-first=A.G. |title=A geologic time scale 2004 |date=2004 |publisher=Cambridge University Press |location=Cambridge, UK |isbn=978-0-521-78142-8}}
The Campanian was an age when a worldwide sea level rise covered many coastal areas. The morphology of some of these areas has been preserved: it is an unconformity beneath a cover of marine sedimentary rocks.{{cite journal |last1=Lidmar-Bergström |first1=Karna |last2=Bonow |first2=Johan M. |last3=Japsen |first3=Peter |author-link=Karna Lidmar-Bergström|date=2013 |title=Stratigraphic Landscape Analysis and geomorphological paradigms: Scandinavia as an example of Phanerozoic uplift and subsidence |journal=Global and Planetary Change |volume=100 |pages=153–171 |doi= 10.1016/j.gloplacha.2012.10.015|bibcode=2013GPC...100..153L }}{{cite journal |last1=Surlyk |first1=Finn |last2=Sørensen |first2=Anne Mehlin |date=2010 |title=An early Campanian rocky shore at Ivö Klack, southern Sweden |journal=Cretaceous Research |volume=31 |issue=6 |pages=567–576 |doi= 10.1016/j.cretres.2010.07.006|bibcode=2010CrRes..31..567S }}
Etymology
The Campanian was introduced in scientific literature by Henri Coquand in 1857. It is named after the French village of Champagne in the department of Charente-Maritime. The original type locality was a series of outcrops near the village of Aubeterre-sur-Dronne in the same region.{{cite journal |last1=Hancock |first1=J.M. |last2=Gale |first2=A.S. |year=1996 |title=The Campanian Stage |journal=Bulletin de l'Institut Royal des Sciences Naturelles de Belgique, Sciences de la Terre |volume=66 |pages=103–109 |url=https://biblio.naturalsciences.be/rbins-publications/bulletin-of-the-royal-belgian-institute-of-natural-sciences-earth-sciences/66-sup-1996/irscnb_p4087_00da07p_66-sup_bulletin-11-red.pdf |access-date=27 September 2021}}
Definition
The base of the Campanian Stage is defined as a place in the stratigraphic column where the extinction of crinoid species Marsupites testudinarius is located. A GSSP was ratified for the base of the Campanian in October 2022, having been placed in Bottaccione, Gubbio, Italy. The top of the Campanian stage is defined as the place in the stratigraphic column where the ammonite Pachydiscus neubergicus first appears.
Subdivisions
The Campanian can be subdivided into Lower, Middle and Upper Subages. In the western interior of the United States, the base of the Middle Campanian is defined as the first occurrence of the ammonite Baculites obtusus (80.97 Ma) and the base of the Upper Campanian defined as the first occurrence of the ammonite Didymoceras nebrascense (76.27 Ma).{{Citation|last1=Ogg|first1=J. G.|title=Chapter 27 - Cretaceous|date=2012-01-01|work=The Geologic Time Scale|pages=793–853|editor-last=Gradstein|editor-first=Felix M.|place=Boston|publisher=Elsevier|language=en|doi=10.1016/b978-0-444-59425-9.00027-5|isbn=978-0-444-59425-9|last2=Hinnov|first2=L. A.|last3=Huang|first3=C.|editor2-last=Ogg|editor2-first=James G.|editor3-last=Schmitz|editor3-first=Mark D.|editor4-last=Ogg|editor4-first=Gabi M.}} In the Tethys domain, the Campanian encompasses six ammonite biozones. They are, from young to old:{{cite journal |last1=Hancock |first1=Jake M. |title=Ammonite scales for the Cretaceous system |journal=Cretaceous Research |date=June 1991 |volume=12 |issue=3 |pages=259–291 |doi=10.1016/0195-6671(91)90037-D|bibcode=1991CrRes..12..259H }}
- zone of Nostoceras hyatti
- zone of Didymoceras chayennense
- zone of Bostrychoceras polyplocum
- zone of Hoplitoplacenticeras marroti / Hoplitoplacenticeras vari
- zone of Delawarella delawarensis
- zone of Placenticeras bidorsatum
Paleontology
{{Main|:Category:Campanian life}}
{{See also|List of vertebrate fauna of the Campanian stage}}
During the Campanian age, a radiation among dinosaur species occurred. In North America, for example, the number of known dinosaur genera rises from four at the base of the Campanian to forty-eight in the upper part. This development is sometimes referred to as the "Campanian Explosion". However, it is not yet clear if the event is artificial, i.e. the low number of genera in the lower Campanian can be caused by a lower preservation chance for fossils in deposits of that age. The generally warm climates and large continental area covered in shallow sea during the Campanian probably favoured the dinosaurs. In the following Maastrichtian stage, the number of North American dinosaur genera found is 30% less than in the upper Campanian.See Weishampel et al. (2004)
See also
References
{{Reflist}}
Further reading
- Varricchio, D. J. 2001. Late Cretaceous oviraptorosaur (Theropoda) dinosaurs from Montana. pp. 42–57 in D. H. Tanke and K. Carpenter (eds.), Mesozoic Vertebrate Life. Indiana University Press, Indianapolis, Indiana.
- {{aut|Weishampel, D.B.; Barrett, P.M.; Coria, R.A.; Le Loueff, J.; Xu, X.; Zhao, X.; Sahni, A.; Gomani, E.M.P. & Noto, C.N.}}; 2004: Dinosaur distribution, in: {{aut|Weishampel, D.B.; Dodson, P. & Osmólska, H.}} (eds.): The Dinosauria, University of California Press, Berkeley (2nd ed.), {{ISBN|0-520-24209-2}}, pp 517–606.
External links
- [https://web.archive.org/web/20100822060927/http://www.stratigraphy.org/bak/geowhen/stages/Campanian.html GeoWhen Database – Campanian]
- [http://stratigraphy.science.purdue.edu/charts/Timeslices/3_Late_Cret.pdf Late Cretaceous timescale], at the website of the subcommission for stratigraphic information of the ICS
- [https://web.archive.org/web/20040511104934/http://norges.uio.no/timescale/Fig18.1_Cret_colA.pdf Stratigraphic chart of the Late Cretaceous], at the website of Norges Network of offshore records of geology and stratigraphy
- [http://www.foraminifera.eu/querydb.php?stage=Campanian&aktion=suche Campanian Microfossils: 75+ images of Foraminifera]
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