Linked Data Service of GSJ
Geological age
[ Ordovician ] Upper level
Ordovician
Late Ordovician
Hirnantian
445.2 ± 1.4
Katian
453 ± 0.7
Sandbian
458.4 ± 0.9
Middle Ordovician
Darriwilian
467.3 ± 1.1
Dapingian
470 ± 1.4
Early Ordovician
Floian
477.7 ± 1.4
Tremadocian
485.4 ± 1.9