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You searched for: Date Created 1908 Remove constraint Date Created: 1908 Publisher Indiana. Department of Geology and Natural Resources Remove constraint Publisher: Indiana. Department of Geology and Natural Resources Subject Topical Subject: Geology, Stratigraphic--Ordovician Remove constraint Subject: Topical Subject: Geology, Stratigraphic--Ordovician

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  • A map of the counties of Dearborn, Ohio, Switzerland, Jefferson and Ripley showing the location of sections and collecting localities and the boundary between the Ordovician and Silurian systems
  • The zero of all these sections is the level of the Ohio River
  • A series of sections from Madison to Richmond, Indiana : showing the horizon of the base of the Saluda formation