PBDB Interval Range

449.6 - 443.8 Ma

International Chronostratigraphic Timescale			Ordovician of the Baltic
Ordovician	Late Ordovician	Hirnantian	Harju	Porkuni			443.8
		Katian		Pirgu			445.2
				Vormsi			449.6 *
				Nabala	Johvi †		450 *
			Viru	Rakvere			450.6 *
				Oandu			452 *
		Sandbian		Keila	Idavere †		453
				Haljala			453.9
				Kukruse			456.4 *
				Uhaku	Aluoja †		457.5 *
	Middle Ordovician	Darriwilian		Uhaku			458.4
				Lasnamagi			458.9 *
				Aseri			460.4 *
			Oeland	Kunda			462.9 *
				Kunda	Valaste †/Hunderum		464.3 *
				Volkhov		Langevoja †/Vaana/Saka	467.1 *
		Dapingian		Volkhov			467.3
		Dapingian		Billingen			469.3 *
	Early Ordovician	Floian					470
					Latorp †		470.1 *
				Hunneberg			473.7 *
		Tremadocian		Hunneberg			477.7
				Varangu			481.3 *
				Pakerort			482.2 *
							485.4 *
							486.3
							486.5