Sheinwoodian
Sheinwoodian | |||||||||||||
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433.4 ± 0.8 – 430.5 ± 0.7 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓ | |||||||||||||
Paleogeography of the late Sheinwoodian | |||||||||||||
Chronology | |||||||||||||
In the geologic timescale, the Sheinwoodian is the age of the Wenlock Epoch of the Silurian Period of the Paleozoic Era of the Phanerozoic Eon that is comprehended between 433.4 ± 0.8 Ma and 430.5 ± 0.7 Ma (million years ago), approximately. The Sheinwoodian Age succeeds the Telychian Age and precedes the Homerian Age.[5] DefinitionThe Wenlock-Llandovery boundary is defined by the first occurrence of Cyrtograptus centrifugus. The stage is named after Sheinwood village, north of Much Wenlock. The Buildwas Formation of Shropshire, United Kingdom contains the type section.[6] References
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Cenozoic Era (present–66.0 Ma) |
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Mesozoic Era (66.0–252 Ma) |
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Paleozoic Era (252–539 Ma) |
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Proterozoic Eon (539 Ma–2.5 Ga) |
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Archean Eon (2.5–4 Ga) | |||||||||||||
Hadean Eon (4–4.6 Ga) | |||||||||||||
ka = kiloannum (thousands years ago); Ma = megaannum (millions years ago); Ga = gigaannum (billions years ago). See also: Geologic time scale • Geology portal • World portal |
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