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Glossary entry

Stratigraphic time

Millions years ago: 470 ±1.4 – 458.4 ±0.9

Ordovician

EdCaCaCaCaOrdOrdOrdSiSiSiSiDeDeDeCarCarPerPerPerTrTrTrJuJuJuCreCrePalEocOlMioPliPleHol


Eon Era System Period Series Epoch Stage Millions
years ago
P
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O
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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

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