Piacenzian

Piacenzian
Piacenzian
Chronology
←	Messinian salinity crisis
←	North American prairie expands
	Subdivision of the Neogene according to the ICS, as of 2021.; Vertical axis: millions of years ago.;
Formerly part of	Tertiary Period/System
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	Base of Gauss/Gilbert (C2An/C2Ar) magnetic reversal
Lower boundary GSSP	Punta Piccola Section, Porto Empedocle, Sicily, Italy; 37°17′20″N 13°29′36″E / 37.2889°N 13.4933°E
Lower GSSP ratified	January 1997
Upper boundary definition	Base of magnetic polarity chronozone C2r (Matuyama); Extinction of the Haptophytes Discoaster pentaradiatus and Discoaster surculus;
Upper boundary GSSP	Monte San Nicola Section, Gela, Sicily, Italy; 37°08′49″N 14°12′13″E / 37.1469°N 14.2035°E
Upper GSSP ratified	1996 (as base of Gelasian)

The Piacenzian is in the international geologic time scale the upper stage or latest age of the Pliocene. It spans the time between 3.6 ± 0.005 Ma and 2.588 ± 0.005 Ma (million years ago). The Piacenzian is after the Zanclean and is followed by the Gelasian (part of the Pleistocene).

The Piacenzian is roughly coeval with the European land mammal age MN 16, overlaps the late Chapadmalalan and early Uquian South American land mammal age and falls inside the more extensive Blancan North American land mammal age. It also correlates with the Astian, Redonian, Reuverian and Romanian regional stages of Europe, and the Waipipian and Mangapanian stages of New Zealand. Some authorities describe the British Red Crag Formation and Waltonian Stage as late Piacenzian,^[6]^[7] while others regard them as early Pleistocene.^[8]^[9]

Carbon dioxide levels during the Piacenzian were similar to those of today, making this age, with global mean temperature 2–3 °C higher and sea levels about twenty meters higher than today, an important analogue for predictions of the future of our world.^[10]

^ Krijgsman, W.; Garcés, M.; Langereis, C. G.; Daams, R.; Van Dam, J.; Van Der Meulen, A. J.; Agustí, J.; Cabrera, L. (1996). "A new chronology for the middle to late Miocene continental record in Spain". Earth and Planetary Science Letters. 142 (3–4): 367–380. Bibcode:1996E&PSL.142..367K. doi:10.1016/0012-821X(96)00109-4.
^ Retallack, G. J. (1997). "Neogene Expansion of the North American Prairie". PALAIOS. 12 (4): 380–390. doi:10.2307/3515337. JSTOR 3515337. Retrieved 2008-02-11.
^ "ICS Timescale Chart" (PDF). www.stratigraphy.org.
^ Castradori, D.; D. Rio; F. J. Hilgen; L. J. Lourens (1998). "The Global Standard Stratotype-section and Point (GSSP) of the Piacenzian Stage (Middle Pliocene)" (PDF). Episodes. 21 (2): 88–93. doi:10.18814/epiiugs/1998/v21i2/003. Retrieved 26 December 2020.
^ Rio, Domenico; R. Sprovieri; D. Castradori; E. Di Stefano (1998). "The Gelasian Stage (Upper Pliocene): A new unit of the global standard chronostratigraphic scale". Episodes. 21 (2): 82–87. doi:10.18814/epiiugs/1998/v21i2/002.
^ "Red Crag Formation". British Geological Survey. Retrieved 5 August 2016.
^ "Global Chronostratigraphical Correlation Table for the Last 2.7 Million Years. v.2011". University of Cambridge. Retrieved 5 August 2016.
^ "The Naze citation" (PDF). Sites of Special Scientific Interest. Natural England. Archived from the original (PDF) on 4 March 2016. Retrieved 5 August 2016.
^ Allaby, Michael (2013). Oxford Dictionary of Geology & Earth Sciences (4th ed.). Oxford University Press. p. 626. ISBN 978-0-19-96530 6-5.
^ de la Vega, E.; Chalk, T. B.; Wilson, P. A.; Bysani, R. P.; Foster, G. L. (2020). "Atmospheric CO₂ during the Mid-Piacenzian Warm Period and the M2 glaciation". Scientific Reports. 10 (1): 11002. Bibcode:2020NatSR..1011002D. doi:10.1038/s41598-020-67154-8. PMC 7347535. PMID 32647351.

[Krijgsman1996-1] Krijgsman, W.; Garcés, M.; Langereis, C. G.; Daams, R.; Van Dam, J.; Van Der Meulen, A. J.; Agustí, J.; Cabrera, L. (1996). "A new chronology for the middle to late Miocene continental record in Spain". Earth and Planetary Science Letters. 142 (3–4): 367–380. Bibcode:1996E&PSL.142..367K. doi:10.1016/0012-821X(96)00109-4.

[Retallack1997-2] Retallack, G. J. (1997). "Neogene Expansion of the North American Prairie". PALAIOS. 12 (4): 380–390. doi:10.2307/3515337. JSTOR 3515337. Retrieved 2008-02-11.

[3] "ICS Timescale Chart" (PDF). www.stratigraphy.org.

[4] Castradori, D.; D. Rio; F. J. Hilgen; L. J. Lourens (1998). "The Global Standard Stratotype-section and Point (GSSP) of the Piacenzian Stage (Middle Pliocene)" (PDF). Episodes. 21 (2): 88–93. doi:10.18814/epiiugs/1998/v21i2/003. Retrieved 26 December 2020.

[5] Rio, Domenico; R. Sprovieri; D. Castradori; E. Di Stefano (1998). "The Gelasian Stage (Upper Pliocene): A new unit of the global standard chronostratigraphic scale". Episodes. 21 (2): 82–87. doi:10.18814/epiiugs/1998/v21i2/002.

[6] "Red Crag Formation". British Geological Survey. Retrieved 5 August 2016.

[7] "Global Chronostratigraphical Correlation Table for the Last 2.7 Million Years. v.2011". University of Cambridge. Retrieved 5 August 2016.

[8] "The Naze citation" (PDF). Sites of Special Scientific Interest. Natural England. Archived from the original (PDF) on 4 March 2016. Retrieved 5 August 2016.

[9] Allaby, Michael (2013). Oxford Dictionary of Geology & Earth Sciences (4th ed.). Oxford University Press. p. 626. ISBN 978-0-19-96530 6-5.

[de_la_vega_2020-10] Vega, E.; Chalk, T. B.; Wilson, P. A.; Bysani, R. P.; Foster, G. L. (2020). "Atmospheric CO₂ during the Mid-Piacenzian Warm Period and the M2 glaciation". Scientific Reports. 10 (1): 11002. Bibcode:2020NatSR..1011002D. doi:10.1038/s41598-020-67154-8. PMC 7347535. PMID 32647351.

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