Aquitanian (stage)

Short description: Oldest age in the Miocene

Aquitanian

23.03 – 20.44 Ma

PreЄ

Chronology

Template:Neogene graphical timeline

Formerly part of| Tertiary Period/System
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 magnetic polarity chronozone C6Cn.2n
* FAD of the Planktonic foraminiferan Paragloborotalia kugleri

Lower boundary GSSP| Lemme-Carrosio Section, Carrosio, Italy
[ ⚑ ] 44°39′32″N 8°50′11″E﻿ / ﻿44.6589°N 8.8364°E﻿ / 44.6589; 8.8364
GSSP ratified| 1996[1]
Upper boundary definition| Not formally defined
Upper boundary definition candidates|

* Near FAD of the Planktonic Foraminiferan Globigerinoides altiaperturus
* Near top of magnetic polarity chronozone C6An

Upper boundary GSSP candidate section(s)| Astronomically tuned ODP-core

The Aquitanian is, in the International Commission on Stratigraphy's (ICS) geologic timescale, the oldest age or lowest stage in the Miocene. It spans the time between 23.03 ± 0.05 Ma and 20.43 ± 0.05 Ma (million years ago) during the Early Miocene. It was a dry, cooling period.[2] The Aquitanian succeeds the Chattian (the youngest age of the Oligocene) and precedes the Burdigalian.

The Aquitanian Age overlaps with the Harrisonian, Agenian, Pareora, Landon, Otaian, and Waitakian Ages from various regional timescales.

## Contents

* 1 Stratigraphic definition
* 2 References
* 2.1 Footnotes
* 2.2 Literature
* 3 External links

## Stratigraphic definition

The Aquitanian Stage was named after the Aquitaine region in France and was introduced in scientific literature by Switzerland stratigrapher Karl Mayer-Eymar in 1858.

The base of the Aquitanian (also the base of the Miocene Series and the Neogene System) is defined as the place in the stratigraphic column at the first appearance of foram species Paragloborotalia kugleri, the extinction of calcareous nanoplankton species Reticulofenestra bisecta (which forms the base of nanoplankton biozone NN1), and the base of magnetic chronozone C6Cn.2n. The official GSSP for the Aquitanian Stage lies in the Lemme-Carrosio section near the small village of Carrosio (north of Genoa) in northern Italy.[3]

The top of the Aquitanian Stage (the base of the Burdigalian) is at the first appearance of foram species Globigerinoides altiaperturus and the top of magnetic chronozone C6An.

## References

### Footnotes

1. ↑ Steininger, Fritz F.; M. P. Aubry; W. A. Berggren; M. Biolzi; A. M. Borsetti; Julie E. Cartlidge; F. Cati; R. Corfield et al. (1997). "The Global Stratotype Section and Point (GSSP) for the base of the Neogene". Episodes 20 (1): 23–28. doi:10.18814/epiiugs/1997/v20i1/005. http://www.stratigraphy.org/GSSP/file9.pdf.
2. ↑ Edward Petuch, Ph.D. Florida Atlantic University, Department of Geosciences
3. ↑ The Aquitanian GSSP was established by Steininger et al. (1997)

### Literature

* Gradstein, F.M.; Ogg, J.G. & Smith, A.G.; 2004: A Geologic Time Scale 2004, Cambridge University Press .
* Mayer-Eymar, K.; 1858: Versuch einer neuen Klassifikation der Tertiär-Gebilde Europa’s, Verhandlungen der Schweizerischen Naturforschenden Gesellschaft 17–19 (August 1857), p. 70–71 & 165–199. (in German)
* Steininger, F.F.; Aubry, M.P.; Berggren, W.A.; Biolzi, M.; Borsetti, A.M.; Cartlidge, J.E.; Cati, F.; Corfield, R.; Gelati, R.; Iaccarino, S.; Napoleone, C.; Ottner, F.; Rogl, F.; Roetzel, R.; Spezzaferri, S.; Tateo, F.; Villa, G. & Zevenboom, D.; 1997: The Global Stratotype Section and Point (GSSP) for the base of the Neogene, Episodes 20(1), p. 23-28.

## External links

* GeoWhen Database - Aquitanian
* Neogene timescale, at the website of the subcommission for stratigraphic information of the ICS
* Neogene timescale at the website of the Norwegian network of offshore records of geology and stratigraphy

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Geological history of Earth

Cenozoic era
(present–66.0 Mya)|

| Quaternary (present–2.588 Mya)|

* Holocene (present–11.784 kya)
* Pleistocene (11.784 kya–2.588 Mya)

|

Neogene (2.588–23.03 Mya)|

* Pliocene (2.588–5.333 Mya)
* Miocene (5.333–23.03 Mya)

Paleogene (23.03–66.0 Mya)|

* Oligocene (23.03–33.9 Mya)
* Eocene (33.9–56.0 Mya)
* Paleocene (56.0–66.0 Mya)

Mesozoic era
(66.0–251.902 Mya)|

| Cretaceous (66.0–145.0 Mya)|

* Late (66.0–100.5 Mya)
* Early (100.5–145.0 Mya)

|

Jurassic (145.0–201.3 Mya)|

* Late (145.0–163.5 Mya)
* Middle (163.5–174.1 Mya)
* Early (174.1–201.3 Mya)

Triassic (201.3–251.902 Mya)|

* Late (201.3–237 Mya)
* Middle (237–247.2 Mya)
* Early (247.2–251.902 Mya)

Paleozoic era
(251.902–541.0 Mya)|

| Permian (251.902–298.9 Mya)|

* Lopingian (251.902–259.8 Mya)
* Guadalupian (259.8–272.3 Mya)
* Cisuralian (272.3–298.9 Mya)

|

Carboniferous (298.9–358.9 Mya)|

* Pennsylvanian (298.9–323.2 Mya)
* Mississippian (323.2–358.9 Mya)

Devonian (358.9–419.2 Mya)|

* Late (358.9–382.7 Mya)
* Middle (382.7–393.3 Mya)
* Early (393.3–419.2 Mya)

Silurian (419.2–443.8 Mya)|

* Pridoli (419.2–423.0 Mya)
* Ludlow (423.0–427.4 Mya)
* Wenlock (427.4–433.4 Mya)
* Llandovery (433.4–443.8 Mya)

Ordovician (443.8–485.4 Mya)|

* Late (443.8–458.4 Mya)
* Middle (458.4–470.0 Mya)
* Early (470.0–485.4 Mya)

Cambrian (485.4–541.0 Mya)|

* Furongian (485.4–497 Mya)
* Miaolingian (497–509 Mya)
* Series 2 (509–521 Mya)
* Terreneuvian (521–541.0 Mya)

Proterozoic eon
(541.0 Mya–2.5 Gya)|

| Neoproterozoic (541.0 Mya–1 Gya)|

* Ediacaran (541.0–~635 Mya)
* Cryogenian (~635–~720 Mya)
* Tonian (~720 Mya–1 Gya)

|

Mesoproterozoic (1–1.6 Gya)|

* Stenian (1–1.2 Gya)
* Ectasian (1.2–1.4 Gya)
* Calymmian (1.4–1.6 Gya)

Paleoproterozoic (1.6–2.5 Gya)|

* Statherian (1.6–1.8 Gya)
* Orosirian (1.8–2.05 Gya)
* Rhyacian (2.05–2.3 Gya)
* Siderian (2.3–2.5 Gya)

Archean eon (2.5–4 Gya)|

| Eras|

* Neoarchean (2.5–2.8 Gya)
* Mesoarchean (2.8–3.2 Gya)
* Paleoarchean (3.2–3.6 Gya)
* Eoarchean (3.6–4 Gya)

|

Hadean eon (4–4.6 Gya)|

|  |

|

kya = thousands years ago. Mya = millions years ago. Gya = billions years ago.
See also: Geologic time scale

[ ⚑ ]  44°39′32″N 8°50′11″E﻿ / ﻿44.6589°N 8.8364°E﻿ / 44.6589; 8.8364

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