There are 6 matches

Collection Authorizer Collection name Reference
23449S. Holland Quimbys Mill Formation Echinoderms, Upper Mississippi Valley Blackriveran - Ordovician 4-5 - Illinois, Iowa Kolata et al. (1987)
23454S. Holland Spechts Ferry Formation Echinoderms, Upper Mississippi Valley Blackriveran/Rocklandian - Ordovician 4-5 - Illinois, Iowa Kolata et al. (1987)
23457S. Holland Guttenberg Formation Echinoderms, Upper Mississippi Valley Rocklandian/Kirkfieldian - Ordovician 4-5 - Illinois, Iowa Kolata et al. (1987)
23460S. Holland Ion Formarion, Buckhorn Member Echinoderms, Upper MIssissippi Valley Kirkfieldian - Ordovician 4-5 - Illinois, Iowa Kolata et al. (1987)
23465S. Holland Ion Formation, St. James Member Echinoderms, Upper Mississippi Valley Kirkfieldian - Ordovician 4-5 - Illinois, Iowa Kolata et al. (1987)
23470S. Holland Dunleith Formation, Eagle Point Member Echinoderms, Upper Mississippi Valley Shermanian - Ordovician 4-5 - Illinois, Iowa Kolata et al. (1987)

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