Ordovician System‏

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Read about the Ordovician System
Cincinnatian SeriesChamplainian SeriesCanadian SeriesSauk SequenceKnox Dolomite Megagroup2Prairie du Chien GroupShakopee DolomiteNew Richmond SandstoneOneota DolomiteGunter SandstoneBlodgett MemberEverton DolomiteChazyan StageBlackriveran StageTrentonian StageEdenian StageMaysvillian StageRichmondian StageTippecanoe SequenceHunton_Limestone MegagroupOttawa_Limestone MegagroupMaquoketa Shale GroupGalena GroupPlatteville_GroupAncell GroupKimmswick SubgroupDecorah SubgroupPlattin SubgroupNeda FormationBrainard ShaleFort Atkinson LimstoneScales ShaleCape LimestoneDubuque FormationDunleith FormationGuttenberg FormationSpechts Ferry FormationQuimbys Mill FormationNachusa FormationGrand Detour FormationMifflin FormationPecatonica FormationSt. Peter SandstoneClermont Shale MemberGirardeau LimestoneScales ShaleOrchard Creek Shale MemberThebes Sandstone MemberCape LimestoneWise Lake FormationStewartsville MemberSinsinawa MemberNew London MemberDunleith FormationSherwood MemberRivoli MemberFairplay MemberEagle Point MemberEagle Point MemberBeecher MemberBeecher MemberSt.James MemberSt. James MemberBuckhorn MemberBuckhorn MemberMincke MemberTyson_MemberKings Lake FormationGarnavillo MemberGarnavillo MemberGlenhavenMemberGlenhaven MemberGuttenberg FormationGlencoe MemberCastlewood MemberCastlewood MemberGlencoe MemberStrawbridge MemberShullsburg MemberHazel Green MemberEverett MemberElm MemberEldena MemberForrestonMemberVictory MemberHely MemberClement MemberStillman MemberWalgreen MemberDement MemberBriton MemberHazelwood MemberEstablishment MemberBrickeys MemberBlomeyer MemberOglesby MemberMedusa MemberNew Glarus MemberDane MemberChana MemberHennepin MemberJoachim DolomiteHarmony Hill Shale MemberMetz MemberLoughridge Sandstone MemberMatson MemberNokomis Sandstone MemberDaysville Dolomite MemberDefianceMemberKingdom Sandstone MemberBoles MemberAugusta MemberAbernathy MemberDutchtown LimestoneSharpsboro MemberGordonville MemberStarved_Rock Sandstone MemberTonti Sandstone MemberKress MemberArsenal MemberSpechts_Ferry_FormationFigure O-4 imagemap.jpg
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Stratigraphic column is from ISGS Bulletin 95 (1975).

Ordovician‏ System


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