Ordovician Period
Mittleres Ordovizium
オルドビス紀中期
Early Ordovician Epoch
Darriwilian Age
a1.1.3.5.2
középső-ordovícium
Kesk-Ordoviitsium
older bound -470.0 +|-1.4 Ma
mellersta ordovicium
中期オルドビス紀
Vidurinis Ordovikas
Keski-Ordoviikki
Ordovícico Médio
Midtre ordovicium
Middle Ordovician
Paleozoic Era
Floian Age
Midden Ordovicium
younger bound -458.4 +|-0.9 Ma
Geologic Time Scale (2018)
中奥陶统
Střední ordovik
Middle Ordovician Epoch
Late Ordovician Epoch
Ordovicien moyen
Base of Late Ordovician
Dapingian Age
Sandbian Age
Phanerozoic Eon
中奥陶世
Ordovícico Medio
Środkowy Ordowik
Среден Ордовик
ordoviciano medio
Mellem Ordovicium
Base of Middle Ordovician
srednji ordovicij
stredný ordovik