PBDB Interval Range

497 - 483.8 Ma

International Chronostratigraphic Timescale			Ordovician of the Baltic
Ordovician	Late Ordovician	Hirnantian	Harju	Porkuni			443.1
		Katian		Pirgu			445.2
				Vormsi			449.5
				Nabala	Johvi †		449.9
			Viru	Rakvere			450.5
				Oandu			451.8
		Sandbian		Keila	Idavere †		452.8
				Haljala			453.9
				Kukruse			456.8
				Uhaku	Aluoja †		458
	Middle Ordovician	Darriwilian		Uhaku			458.2
				Lasnamagi			459.7
				Aseri			461.4
			Oeland	Kunda			464.3
				Kunda	Valaste †/Hunderum		465.9 *
				Volkhov		Langevoja †/Vaana/Saka	469.1 *
		Dapingian		Volkhov			469.4
	Early Ordovician	Floian		Billingen			471.3 *
				Billingen	Latorp †		472.1 *
				Hunneberg			475.6 *
		Tremadocian		Hunneberg			477.1
				Varangu			482.9 *
				Pakerort			483.8 *
				Pakerort			486.4 *
Cambrian	Furongian	Stage 10					486.85
		Jiangshanian					491
		Paibian					494.2
	Miaolingian	Guzhangian					497
		Drumian					500.5
		Wuliuan					504.5
	Series 2	Stage 4					506.5
	Series 2	Stage 3					514.5
	Terreneuvian	Stage 2					521
	Terreneuvian	Fortunian					529
							538.8