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Glossary entry

Other names

Tremadocian

Stratigraphic time

Millions years ago: 485.4 ±1.9 – 477.7 ±1.4

Ordovician > Lower Ordovician

EdCaCaCaCaOrOrOrSiSiSiSiDeDeDeCarCarPePePeTrTrTrJuJuJuCreCrePalEoOlMiPliPleHol


Eon Era System Period Series Epoch Stage Millions
years ago
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Upper Ordovician Hirnantian 443.8±1.5
Katian 445.2±1.4
Sandbian 453±0.7
Middle Ordovician Darriwilian 458.4±0.9
Dapingian 467.3±1.1
Lower Ordovician Floian 470±1.4
Tremadocian 477.7±1.4

CZ  

United Kingdom stratigraphy
Ashgill (Katian – Hirnantian)Hirnantian (Hirnantian)
Rawtheyan (Katian)
Cautleyan (Katian)
Pusgillian (Katian)
Caradoc (Sandbian – Katian)Streffordian (Katian)
Cheneyan (Katian)
Burrellian (Sandbian – Katian)
Aurelucian (Sandbian)
Llanvirn (Darriwilian)Llandeilian (Darriwilian)
Abereiddian (Darriwilian)
Arenig (Floian – Darriwilian)Fennian (Dapingian – Darriwilian)
Whitlandian (Floian – Dapingian)
Moridunian (Floian)
Tremadoc (Tremadoc)Migneintian (Tremadoc)
Cressagian (Tremadoc)

Preceded by
Followed by
Divided into

Lithostratigraphy

Morocco: Lower Fezouata formation, Czechia: Třenice formation, Mílina formation, Lipoltice formation, Norway: Alum Shale formation, Björkåsholmen formation, France: Saint-Chinian formation, Sweden: Alum Shale formation, Björkåsholmen formation, Italy: Cabitza formation, Russia: Tolstochikha formation, Ust'kut formation, Spain: Santed formation, Najerilla formation, United Kingdom: Dol-Cyn-Afon formation, Shineton shale, Canada: Broken Skull formation, United States of America: Shakopee dolomite, Oneota dolomite, Emigrant formation, Fillmore formation, Manitou formation, Argentina: Rupasca formation, Santa Rosita formation, Devendeus formation, Los Sombreros formation, San Juan formation, La Silla formation, Bolivia: Iscayachi formation, Kazakhstan: Agalatas formation, Kendyktas formation, Kurdai formation, China: Yinchufu formation, Liuxia formation, Shijiautou formation, Jingshan formation, Madaoyu formation, Nantsinkwan formation, South Korea: Dongjeom formation, Dumugol formation, Pakistan: Misri Banda formation, Australia: Nora formation, Emanuel formation

List of taxa

Number of records
Taxa13

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