Piacenzian


Piacenzian
System Series Stage Age (Ma)
Quaternary Pleistocene Gelasian younger
Neogene Pliocene Piacenzian 2.588–3.600
Zanclean 3.600–5.332
Miocene Messinian 5.332–7.246
Tortonian 7.246–11.608
Serravallian 11.608–13.65
Langhian 13.65–15.97
Burdigalian 15.97–20.43
Aquitanian 20.43–23.03
Paleogene Oligocene Chattian older
Subdivision of the Neogene Period according to the IUGS, as of July 2009.

The Piacenzian is in the international geologic timescale 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 on top of the Zanclean and is followed by the Gelasian (part of the Pleistocene).

The Piacenzian is roughly coeval with the European Land Mammal Mega Zone MN 16, overlaps the late Chapadmalalan and early Uquian South American Land Mammal Ages, and falls inside the more extensive Blancan North American Land Mammal Age. It also correlates with regional stages like the Astian, Redonian, Waltonian (England), Reuverian (Netherlands) or Romanian (Central Europe).

Contents

Definition

The Piacenzian was introduced in scientific literature by Swiss stratigrapher Karl Mayer-Eymar in 1858. It is named after the Italian city of Piacenza.

The base of the Piacenzian is at the base of magnetic chronozone C2An (the base of the Gauss chronozone and at the extinction of the planktonic forams Globorotalia margaritae and Pulleniatina primalis. The GSSP for the Piacenzian stage is at Punta Piccola on Sicily, Italy.[1]

The top of the Piacenzian (the base of the Quaternary system and the Pleistocene series) is defined magnetostratigraphically as the base of the Matuyama (C2r) chronozone (at the Gauss-Matuyama reversal), and isotopic stage 103. Above this point there are notable extinctions of the calcareous nannofossils: Discoaster pentaradiatus and Discoaster surculus.[2]

Climate

Climate of the Piacenzian would have started as a somewhat wet and warm period in North America occurring just after a brief cooling period of the Zanclean. Deposition of sediments and mollusks of the Piacenzian correspond with the rise in sea level creating the Tamiami Subsea and Jackson Subsea of Florida, Duplin Subsea generally of South Carolina, and Yorktown Subsea of the Outer Banks and inland North Carolina. Dates have been established on the basis of the genera and species of mollusks found.[3]

References

Notes

  1. ^ Castradori et al. (1998)
  2. ^ Gadstein et al. (2005), p. 28; Rio et al. (1998)
  3. ^ Petuch, Edward J., Ph.D. Florida Atlantic University, Department of Geodsciences. Cenozoic Seas: The View From Eastern North America. CRC Press, Dec. 29, 2003. ISBN 0849316324.

Literature

External links

Neogene Period
Miocene Pliocene
Aquitanian | Burdigalian
Langhian | Serravallian
Tortonian | Messinian
Zanclean | Piacenzian

Wikimedia Foundation. 2010.

Look at other dictionaries:

  • Piacenzian Stage — ▪ paleontology       the uppermost division of Pliocene (Pliocene Epoch) rocks, representing all rocks deposited worldwide during the Piacenzian Age (3.6 million to 2.5 million years ago) of the Neogene Period (the past 23 million years). The… …   Universalium

  • Miocene — System Series Stage Age (Ma) Quaternary Pleistocene Gelasian younger Neogene Pliocene …   Wikipedia

  • Neogene — Period 23.03–2.588 million years ago …   Wikipedia

  • Messinian — System Series Stage Age (Ma) Quaternary Pleistocene Gelasian younger Neogene Pliocene …   Wikipedia

  • Drynaria — Basket ferns Temporal range: Piacenzian to Present …   Wikipedia

  • Okeechobean Sea — Table displaying the Okeechobean Sea and its relation to geologic time and North American Land Mammal Ages. Dry periods or marine regressive periods are tan in color. The Okeechobean Sea was a Cenozoic eutropical subsea, which along with the… …   Wikipedia

  • Geologic time scale — This clock representation shows some of the major units of geological time and definitive events of Earth history. The Hadean eon represents the time before fossil record of life on Earth; its upper boundary is now regarded as 4.0 Ga.[1] Other… …   Wikipedia

  • Middle Pleistocene — Subdivisions of the Quaternary Period System Series Stage Age (Ma) Quaternary Holocene 0–0.0117 Pleistocene Tarantian (Upper) 0.0117–0.126 …   Wikipedia

  • Point Stratotypique Mondial — Le Point Stratotypique Mondial (PSM) (Global Boundary Stratotype Section and Point, GSSP), définit les limites existantes entre deux étages géologiques, ne laissant pas la posssibilité de vide ou de chevauchement entre eux. Les PSM sont établie… …   Wikipédia en Français

  • Point stratotypique mondial — Le Point Stratotypique Mondial (PSM) (Global Boundary Stratotype Section and Point, GSSP), définit les limites existantes entre deux étages géologiques, ne laissant pas la possibilité de vide ou de chevauchement entre eux. Les PSM sont établis… …   Wikipédia en Français