Earth:Ludlow epoch

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Short description: 3rd series of the Silurian
Ludlow
427.4 ± 0.5 – 423.0 ± 2.3 Ma
Chronology
Silurian graphical timeline
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Subdivision of the Silurian according to the ICS, as of 2021.[3]
Vertical axis scale: millions of years ago.
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, United Kingdom
52°21′33″N 2°46′38″W / 52.3592°N 2.7772°W / 52.3592; -2.7772
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
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
Arctinurus boltoni.jpg

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. "Chart/Time Scale". International Commission on Stratigraphy. http://www.stratigraphy.org/index.php/ics-chart-timescale. 
  4. 4.0 4.1 Holland, C. (1982). "The State of Silurian Stratigraphy". Episodes 1982 (3): 21–23. doi:10.18814/epiiugs/1982/v5i3/004. https://stratigraphy.org/gssps/files/sheinwoodian-ludfordian.pdf. Retrieved 11 December 2020. 
  5. Lucas, Sepncer (6 November 2018). "The GSSP Method of Chronostratigraphy: A Critical Review". Frontiers in Earth Science 6: 191. doi:10.3389/feart.2018.00191. Bibcode2018FrEaS...6..191L. 
  6. Holland, C. (June 1985). "Series and Stages of the Silurian System". Episodes 8 (2): 101–103. doi:10.18814/epiiugs/1985/v8i2/005. https://timescalefoundation.org/references/Silurian1.pdf. Retrieved 11 December 2020.