Type
Age
Age range
438.6–425 Ma

International Timescale

Ludlow
Ludfordian
Gorstian
Wenlock
Homerian
Sheinwoodian
Llandovery
Telychian
Aeronian

COSUNA

Cayugan
Niagaran
Alexandrian

North American Regional

Cayugan
Niagaran
Alexandrian
439438437436435434433432431430429428427426425

Macrostrat

Data

Platform

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