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22. Conodonts of the Trenton group (Ordovician) in New York, Southern Ontario, and Quebec
23. The Chopawamsic Formation-- : a new stratigraphic unit in the Piedmont of northeastern Virginia
24. The Chopawamsic Formation-- : a new stratigraphic unit in the Piedmont of northeastern Virginia
25. Calloway Creek limestone and Ashlock and Drakes formations (Upper Ordovician) in south-central Kentucky
26. Clays Ferry formation (Ordovician) -- a new map unit in south-central Kentucky
27. Calloway Creek limestone and Ashlock and Drakes Formations (Upper Ordovician) in south-central Kentucky
28. Clays Ferry Formation (Ordovician) : a new map unit in south-central Kentucky
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