Oandu age - Rhuddanian age

International Chronostratigraphic TimescaleOrdovician of the Baltic
SilurianPridoli419.62
LudlowLudfordian422.7
Gorstian425
WenlockHomerian426.7
Sheinwoodian430.6
LlandoveryTelychian432.9
Aeronian438.6
Rhuddanian440.5
OrdovicianLate OrdovicianHirnantianHarjuPorkuni443.1
KatianPirgu445.2
Vormsi449.5
NabalaJohvi †449.9
ViruRakvere450.5
Oandu451.8
SandbianKeilaIdavere †452.8
Haljala453.9
Kukruse456.8
UhakuAluoja †458
Middle OrdovicianDarriwilian458.2
Lasnamagi459.7
Aseri461.4
OelandKunda464.3
Valaste †/Hunderum465.9 *
VolkhovLangevoja †/Vaana/Saka469.1 *
Dapingian469.4
Early OrdovicianFloianBillingen471.3 *
Latorp †472.1 *
Hunneberg475.6 *
Tremadocian477.1
Varangu482.9 *
Pakerort483.8 *
486.4 *
486.85