(Rock Barn) SE of Dumont, section 35, Butler County, IA. IA3 E. 1.0 miles from jct with CR T16 (Montrose) in Dumont to the barn on the S. side of the road up a driveway 0.3 miles at 14012 IA3. (11-2-01, N42 44.425 W92 56.796)

Close-up of the rock (limestone).