BULL. GEOL. SOC. AM. 



VOL. 20, 1908, PL. 34 



EnaPHnK 



Figure 1. — Lower Tart near South End 

 (a) Sub-Aftonian ; (&) weathered band of (a) ; (c) Aftonian 



Figure 2. — Upper Part near North Exd 

 (a) Kansan ; (6) Aftonian ; (c) tains. 



COUNTY-LINE EXPOSURES OF AFTONIAN, SECTION 5, TOWNSHIP 81 NORTH, RANGE 44 WEST 



