Type
Age
Age range
453.5–450 Ma
Late Ordovician
Katian
Sandbian
Richmondian-Hirnantian
Edenian-Maysvillian
Rocklandian-Shermanian
453.6453.4453.2453.0452.8452.6452.4452.2452.0451.8451.6451.4451.2451.0450.8450.6450.4450.2450.0