BULL. GEOL. SOC. AM. 



VOL. 12. 1900, PL. 37 



FiGUUE 1. — Clinton and Okooviciax .\t South Tvnnkl 



Figure 2. — T f Luiisvim.e at Bi.kdsoe 



CLINTON, ORDOVICIAN, AND TOP OF LOUISVILLE 



