NO. 15 



SMITHSONIAN EXPLORATIONS, I92I 



^^ 



Fig. 25. — Contorted and cross bedded phosphate rock, Franklin, Tenn. (Photo- 

 graph by Rassler. ) 



i'Vj. ^-j. — ...a.^.^ive limestone with an intercalated coral reef, near Franklin, 

 Tenn. (Photograph by Bassler.) 



