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| name_formality = Formal
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| name_accept_date = 1980<ref name="silurianState">{{cite journal |last1=Holland |first1=C. |title=The State of Silurian Stratigraphy |journal=Episodes |date=1982 |volume=1982 |pages=21-23 |url=https://stratigraphy.org/gssps/files/sheinwoodian-ludfordian.pdf |access-date=11 December 2020}}</ref>
| name_accept_date = 1980<ref name="silurianState">{{cite journal |last1=Holland |first1=C. |title=The State of Silurian Stratigraphy |journal=Episodes |date=1982 |volume=1982 |issue=3 |pages=21–23 |doi=10.18814/epiiugs/1982/v5i3/004 |url=https://stratigraphy.org/gssps/files/sheinwoodian-ludfordian.pdf |access-date=11 December 2020}}</ref>
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| upper_gssp_location = [[Požáry Section]], [[Řeporyje|Řeporyje District]], [[Prague]], [[Czechia]]
| upper_gssp_location = [[Požáry Section]], [[Řeporyje|Řeporyje District]], [[Prague]], [[Czechia]]
| upper_gssp_coords = {{Coord|50.0277|N|14.3249|E|display=inline}}
| upper_gssp_coords = {{Coord|50.0277|N|14.3249|E|display=inline}}
| upper_gssp_accept_date = 1984<ref>{{cite journal |last1=Lucas |first1=Sepncer |title=The GSSP Method of Chronostratigraphy: A Critical Review |journal=Frontiers in Earth Science |date=6 November 2018 |doi=10.3389/feart.2018.00191 |url=https://www.frontiersin.org/articles/10.3389/feart.2018.00191/full |access-date=11 December 2020|doi-access=free }}</ref><ref>{{cite journal |last1=Holland |first1=C. |title=Series and Stages of the Silurian System |journal=Episodes |date=June 1985 |volume=8 |pages=101-103 |doi=10.18814/epiiugs/1985/v8i2/005 |url=https://timescalefoundation.org/references/Silurian1.pdf |access-date=11 December 2020|doi-access=free }}</ref>
| upper_gssp_accept_date = 1984<ref>{{cite journal |last1=Lucas |first1=Sepncer |title=The GSSP Method of Chronostratigraphy: A Critical Review |journal=Frontiers in Earth Science |date=6 November 2018 |volume=6 |page=191 |doi=10.3389/feart.2018.00191 |bibcode=2018FrEaS...6..191L |doi-access=free }}</ref><ref>{{cite journal |last1=Holland |first1=C. |title=Series and Stages of the Silurian System |journal=Episodes |date=June 1985 |volume=8 |issue=2 |pages=101–103 |doi=10.18814/epiiugs/1985/v8i2/005 |url=https://timescalefoundation.org/references/Silurian1.pdf |access-date=11 December 2020|doi-access=free }}</ref>
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Revision as of 15:53, 21 June 2021

Ludlow
427.4 ± 0.5 – 423.0 ± 2.3 Ma
↓
Chronology
Etymology
Name formalityFormal
Name ratified1980[4]
Usage information
Celestial bodyEarth
Regional usageGlobal (ICS)
Time scale(s) usedICS Time Scale
Definition
Chronological unitEpoch
Stratigraphic unitSeries
Time span formalityFormal
Lower boundary definitionFAD of the Graptolite Saetograptus (Colonograptus) varians
Lower boundary GSSPPitch Coppice, Ludlow, U.K.
52°21′33″N 2°46′38″W / 52.3592°N 2.7772°W / 52.3592; -2.7772
Lower GSSP ratified1980[4]
Upper boundary definitionFAD of the Graptolite Monograptus parultimus.
Upper boundary GSSPPožáry Section, Řeporyje District, Prague, Czechia
50°01′40″N 14°19′30″E / 50.0277°N 14.3249°E / 50.0277; 14.3249
Upper GSSP ratified1984[5][6]

In the geological timescale, the Ludlow epoch (from 427.4 ± 0.5 million years ago to 423.0 ± 2.3 million years ago) occurred during the Silurian period, after the end of the Homerian age. It is named for the town of Ludlow in Shropshire, England.

The Ludlow epoch is subdivided into two stages: Gorstian and Ludfordian.

Paleontology

Arthropods

Arthropods of the Ludlow
Taxa Presence Location Description Images
Arctinurus Wenlock epoch to Ludlow epoch Europe and North America Large (up to 30 centimetres (12 in)) trilobite

See also

References

  1. ^ Jeppsson, L.; Calner, M. (2007). "The Silurian Mulde Event and a scenario for secundo—secundo events". Earth and Environmental Science Transactions of the Royal Society of Edinburgh. 93 (02): 135–154. doi:10.1017/S0263593300000377.
  2. ^ Munnecke, A.; Samtleben, C.; Bickert, T. (2003). "The Ireviken Event in the lower Silurian of Gotland, Sweden-relation to similar Palaeozoic and Proterozoic events". Palaeogeography, Palaeoclimatology, Palaeoecology. 195 (1): 99–124. doi:10.1016/S0031-0182(03)00304-3.
  3. ^ "International Chronostratigraphic Chart" (PDF). International Commission on Stratigraphy. September 2023. Retrieved December 16, 2024.
  4. ^ a b Holland, C. (1982). "The State of Silurian Stratigraphy" (PDF). Episodes. 1982 (3): 21–23. doi:10.18814/epiiugs/1982/v5i3/004. Retrieved 11 December 2020.
  5. ^ Lucas, Sepncer (6 November 2018). "The GSSP Method of Chronostratigraphy: A Critical Review". Frontiers in Earth Science. 6: 191. Bibcode:2018FrEaS...6..191L. doi:10.3389/feart.2018.00191.
  6. ^ Holland, C. (June 1985). "Series and Stages of the Silurian System" (PDF). Episodes. 8 (2): 101–103. doi:10.18814/epiiugs/1985/v8i2/005. Retrieved 11 December 2020.


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