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Gorstian

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Sixth stage of the Silurian
Gorstian
427.4 ± 0.5 – 425.6 ± 0.9 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Paleogeography of the late Gorstian, 425 Ma
Chronology
−444 —–−442 —–−440 —–−438 —–−436 —–−434 —–−432 —–−430 —–−428 —–−426 —–−424 —–−422 —–−420 —–−418 —PaleozoicOSilurianDLLlandoveryWenlockLudlowPřídolíEHirnantianRhuddanianAeronianTelychianSheinwoodianHomerianGorstianLudfordianLochkovian      
←Lau event
←Mulde event
←Ireviken event
Subdivision of the Silurian according to the ICS, as of 2023.
Vertical axis scale: Millions of years ago
Etymology
Name formalityFormal
Name ratified1980
Usage information
Celestial bodyEarth
Regional usageGlobal (ICS)
Time scale(s) usedICS Time Scale
Definition
Chronological unitAge
Stratigraphic unitStage
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
Upper boundary definitionImprecise. Near FAD of the graptolite Saetograptus leintwardinensis
Upper boundary definition candidatesNone
Upper boundary GSSP candidate section(s)None
Upper boundary GSSPSunnyhill, Ludlow, England
52°21′33″N 2°46′38″W / 52.3592°N 2.7772°W / 52.3592; -2.7772
Upper GSSP ratified1980

In the geologic timescale, the Gorstian is an age of the Ludlow Epoch of the Silurian Period of the Paleozoic Era of the Phanerozoic Eon that is comprehended between 427.4 ± 0.5 Ma and 425.6 ± 0.9 Ma (million years ago), approximately. The Gorstian Age succeeds the Homerian Age and precedes the Ludfordian Age. The age is named after Gorsty village southwest of Ludlow. The base of the age is marked by Saetograptus (Colonograptus) varians. The type section is located in a quarry in the Elton Formation at Pitch Coppice, Shropshire, United Kingdom.

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. ^ Holland, C. (1982). "The State of Silurian Stratigraphy" (PDF). Episodes. 1982: 21–23. Retrieved 11 December 2020.
  5. Gradstein, Felix M.; Ogg, James G.; Smith, Alan G. (2004). A Geologic Time Scale 2004. ISBN 9780521786737.
Geological history of Earth
Cenozoic Era
(present–66.0 Ma)
Quaternary (present–2.58 Ma)
Neogene (2.58–23.0 Ma)
Paleogene (23.0–66.0 Ma)
Mesozoic Era
(66.0–252 Ma)
Cretaceous (66.0–145 Ma)
Jurassic (145–201 Ma)
Triassic (201–252 Ma)
Paleozoic Era
(252–539 Ma)
Permian (252–299 Ma)
Carboniferous (299–359 Ma)
Devonian (359–419 Ma)
Silurian (419–444 Ma)
Ordovician (444–485 Ma)
Cambrian (485–539 Ma)
Proterozoic Eon
(539 Ma–2.5 Ga)
Neoproterozoic (539 Ma–1 Ga)
Mesoproterozoic (1–1.6 Ga)
Paleoproterozoic (1.6–2.5 Ga)
Archean Eon (2.5–4 Ga)
Hadean Eon (4–4.6 Ga) 
ka = kiloannum (thousand years ago); Ma = megaannum (million years ago); Ga = gigaannum (billion years ago).
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