Search:Ordovician System: Difference between revisions
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Stratigraphic column is from ISGS Bulletin 95 (1975).<br> | Stratigraphic column is from ISGS Bulletin 95 (1975).<br> | ||
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{{#ask:[[Category:Ordovician System]] | |||
|format=ol | |format=ol | ||
|limit=500 | |limit=500 |