ADDITIONAL EVIDENCES OF POST-KANSAN GLACIATION IN 
JOHNSON COUNTY, IOWA. 
MORRIS M. LEIGHTON. 
Johnson County offers a field of phenomena that are strikingly appli- 
cable to the theme of our late Pleistocene controversy, namely, “Has 
the northeast quarter of Iowa, except the Driftless Area, been invaded 
by an ice-sheet later than the Kansan?” 
It is with certain of these phenomena that this paper will attempt to 
deal. The area studied in particular was the northwest two-thirds of 
Johnson County. As shown in Fig. 1, it includes the North Liberty and 
Shueyville lobes of the Iowan drift, mapped by the late Professor Samuel 
Calvin, and the bordering areas of the Kansan drift. 
Fig. 1. — Drift map of northern part of Johnson county. 
