Earth:Pridoli epoch

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Short description: Final Series (Epoch) of the Silurian
423.0 ± 2.3 – 419.2 ± 3.2 Ma
Gondwana 420 Ma.png
Paleogeography of the Pridoli, 420 Ma
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.
Name formalityFormal
Name ratified1984
Usage information
Celestial bodyEarth
Regional usageGlobal (ICS)
Time scale(s) usedICS Time Scale
Chronological unitEpoch
Stratigraphic unitSeries
Time span formalityFormal
Lower boundary definitionFAD of the graptolite Monograptus parultimus
Lower boundary GSSPPožáry Section, Řeporyje District, Prague, Czech Republic
50°01′40″N 14°19′30″E / 50.0277°N 14.3249°E / 50.0277; 14.3249
GSSP ratified1984[4][5]
Upper boundary definitionFAD of the graptolite Monograptus uniformis
Upper boundary GSSPKlonk, Prague, Czech Republic
49°51′18″N 13°47′31″E / 49.8550°N 13.7920°E / 49.8550; 13.7920
GSSP ratified1972[6]

In the geologic timescale, the Přídolí epoch is the uppermost subdivision of the Silurian period, dated at between 423 ± 2.3 and 419.2 ± 3.2 mya (million years ago). The Přídolí epoch succeeds the Ludfordian Stage and precedes the Lochkovian, the lowest of three stages within the Lower Devonian geological epoch. It is named after one locality at the Homolka a Přídolí nature reserve near the Prague suburb, Slivenec, in the Czech Republic .[7] The GSSP is located within the Požáry Formation, overlying the Kopanina Formation. Přídolí is the old name of a cadastral field area.[8]

Pridoli geology

Pridoli life



Bony fish

Bony fish of the Pridoli
Taxa Presence Location Description Images
Guiyu BW.jpg
Psarolepis BW.jpg


  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. 
  4. 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. 
  5. Holland, C. (June 1985). "Series and Stages of the Silurian System". Episodes 8 (2): 101–103. doi:10.18814/epiiugs/1985/v8i2/005. Retrieved 11 December 2020. 
  6. Chlupáč, Ivo; Hladil, Jindrich (January 2000). "The global stratotype section and point of the Silurian-Devonian boundary". CFS Courier Forschungsinstitut Senckenberg. Retrieved 7 December 2020. 
  7. Gradstein, Felix M.; Ogg, James G.; Smith, Alan G. (2004). A Geologic Time Scale 2004. ISBN 9780521786737. 
  8. Manda, Štěpán; Frýda, Jiří (2010). "Silurian-Devonian boundary events and their influence on cephalopod evolution: evolutionary significance of cephalopod egg size during mass extinctions". Bulletin of Geosciences 85 (3): 513–40. doi:10.3140/bull.geosci.1174.