Type
Age
Age range
455.5–454.5 Ma
Late Ordovician
Sandbian
Shermanian
Kirkfield
Rocklandian
455.5455.4455.4455.4455.3455.3455.2455.1455.1455.1455.0454.9454.9454.9454.8454.8454.7454.6454.6454.6454.5