Serravallian

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Serravallian
13.82 – 11.63 Ma
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Chronology
Formerly part of Tertiary Period/System
Etymology
Geochronological nameFormal
Usage information
Celestial body Earth
Regional usageGlobal (ICS)
Time scale(s) usedICS Time Scale
Definition
Chronological unit Age
Stratigraphic unit Stage
Time span formalityFormal
Lower boundary definitionMi3b Oxygen-isotopic event (Global cooling episode)
Lower boundary GSSPRas il Pellegrin section, Fomm ir-Riħ Bay, Malta
35°54′50″N14°20′10″E / 35.9139°N 14.3361°E / 35.9139; 14.3361
Lower GSSP ratified2007 [4]
Upper boundary definitionLAD of the Haptophyte Discoaster kugleri
Upper boundary GSSPMonte dei Corvi Beach section, Ancona, Italy
43°35′12″N13°34′10″E / 43.5867°N 13.5694°E / 43.5867; 13.5694
Upper GSSP ratified2003 [5]

The Serravallian is, in the geologic timescale, an age or a stage in the middle Miocene Epoch/Series, which spans the time between 13.82 Ma and 11.63 Ma (million years ago). The Serravallian follows the Langhian and is followed by the Tortonian. [6]

Contents

It overlaps with the middle of the Astaracian European Land Mammal Mega Zone, the upper Barstovian and lower Clarendonian North American Land Mammal Ages and the Laventan and lower Mayoan South American Land Mammal Ages. It is also coeval with the Sarmatian and upper Badenian Stages of the Paratethys time scale of Central and eastern Europe.

Definition

The Serravallian Stage was introduced in stratigraphy by the Italian geologist Lorenzo Pareto in 1865. [7] It was named after the town of Serravalle Scrivia in northern Italy.

The base of the Serravallian is at the first occurrence of fossils of the nanoplankton species Sphenolithus heteromorphus and is located in the chronozone C5ABr. The official Global Boundary Stratotype Section and Point (GSSP) for the Serravallian is in the 'Ras il-Pellegrin' section, located at the 'Ras il-Pellegrin' headland in the vicinity of 'Fomm ir-Rih' Bay, SW Malta.The base of the Serravallian is represented in the field as the formation boundary between the Globigerina Limestone formation and the Blue Clay formation. [8] The base of the Serravallian is related to the Mi3b oxygen isotope excursion marking the onset of the Middle Miocene Cooling step.

The top of the Serravallian (the base of the Tortonian Stage) is at the last common appearance of calcareous nanoplanktons Discoaster kugleri and planktonic foram Globigerinoides subquadratus . It is also associated with the short normal-polarized chronozone C5r.2n.

Paleontology

Cartilaginous fish

Birds

Ancestors of the long-tailed duck have been found dating from the Serravalian of Hungary Long-tailed-duck (cropped).jpg
Ancestors of the long-tailed duck have been found dating from the Serravalian of Hungary

Mammals

Reptiles

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Calabrian is a subdivision of the Pleistocene Epoch of the geologic time scale, defined as 1.8 Ma—774,000 years ago ± 5,000 years, a period of ~1.026 million years.

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The Chattian is, in the geologic timescale, the younger of two ages or upper of two stages of the Oligocene Epoch/Series. It spans the time between 27.82 and23.03 Ma. The Chattian is preceded by the Rupelian and is followed by the Aquitanian.

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<span class="mw-page-title-main">Ladinian</span> Age in the Middle Triassic

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References

Notes

  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.
  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. ↑ Hilgen, F. J.; H. A. Abels; S. Iaccarino; W. Krijgsman; I. Raffi; R. Sprovieri; E. Turco; W. J. Zachariasse (2009). "The Global Stratotype Section and Point (GSSP) of the Serravallian Stage (Middle Miocene)" (PDF). Episodes. 32 (3): 152–166. doi: 10.18814/epiiugs/2009/v32i3/002 . Retrieved 26 December 2020.
  5. ↑ Hilgen, F. J.; Hayfaa Abdul Aziz; Bice, David; Iaccarino, Silvia; Krijgsman, Wout; Kuiper, Klaudia; Montanari, Alessandro; Raffi, Isabella; Turco, Elena; Willem-Jan Zachariasse (2005). "The Global boundary Stratotype Section and Point (GSSP) of the Tortonian Stage (Upper Miocene) at Monte Dei Corvi" (PDF). Episodes. 28 (1): 6–17. doi: 10.18814/epiiugs/2005/v28i1/001 . Retrieved 26 December 2020.
  6. ↑ Gradstein et al. (2004)
  7. ↑ "Lorenzo Pareto, Note sur les subdivisions que l'on pourrait établir dans les terrains tertaires de l'Apennin septentrional In Bulletin de la Société Géologique de France, volume 22, série 2, pp. 210-277" (PDF). Archived from the original (PDF) on 2021-01-15. Retrieved 2013-03-09.
  8. ↑ "GSSP Table - All Periods". Archived from the original on 2020-05-11.
  9. ↑ Pimiento, C.; Clements, C. F. (2014). "When Did Carcharocles megalodon Become Extinct? A New Analysis of the Fossil Record". PLOS ONE. 9 (10): e111086. Bibcode:2014PLoSO...9k1086P. doi: 10.1371/journal.pone.0111086 . PMC   4206505 . PMID   25338197.
  10. ↑ Gál, Erika; Hír, János; Kessler, Eugén; Kókay, József (1998–1999). "Középsõ-miocén õsmaradványok, a Mátraszõlõs, Rákóczi-kápolna alatti útbevágásból. I. A Mátraszõlõs 1. lelõhely" [Middle Miocene fossils from the sections at the Rákóczi chapel at Mátraszőlős. Locality Mátraszõlõs I.](PDF). Folia Historico Naturalia Musei Matraensis (in Hungarian). 23: 33–78. Archived from the original (PDF) on 2011-07-21. Retrieved 2007-02-06.
  11. ↑ Moyà-Solà, S.; Albab, David M.; Almécija, Sergio; Casanovas-Vilar, I; Köhler, M; De Esteban-Trivigno, S; Robles, JM; Galindo, J; Fortuny, J (2009). "A unique Middle Miocene European hominoid and the origins of the great ape and human clade". PNAS . 106 (24): 9601–9606. Bibcode:2009PNAS..106.9601M. doi: 10.1073/pnas.0811730106 . PMC   2701031 . PMID   19487676..
  12. ↑ Hugall, Andrew; Foster, Ralph; Hutchinson, Mark; Michael, Lee (January 2008). "Phylogeny of Australasian agamid lizards based on nuclear and mitochondrial genes: implications for morphological evolution and biogeography". Biological Journal of the Linnean Society. 93 (2): 343–358. doi: 10.1111/j.1095-8312.2007.00911.x .

Literature

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