U. S. GEOLOGICAL SURVEY 



PROFESSIONAL PAPER 91 PLATE IV 



.1. EXPOSURE OF FOSSILIFEROUS CLAY OF WILCOX AGE IN THE LAGRANGE 

 FORMATION AT PURYEAR, TENN. 



B^ EXPObURE OF FObblLlFEROUb CLAY IN THt HOLLY bPlilNGS SAND AT 



OXFORD, MISS. 



