BULL. GEOL. SOC. AM. 



VOL. 20, 1908, PL. 1 



Figure 1. — View in the geivel Pit at Afton Junction, Iowa 



Showing (1) Aftonian gravels more than 20 feet in thickness, rising a few feet 

 above the railway grade; ( -± ) Kansan drift much weathered and stained in the upper 

 zone ; (3) loess. 



Figure 2. — Secticx in railway Cut in Toledo Township,, Tama County, Iowa 

 Showing well defined soil-band between the pre-Kansan and the Kansan. drifts 



GLACIAL PHENOMENA AT AFTON JUNCTION AND IN TAMA COUNTY, IOWA 



