Pabian, R. K., 1969 Unadilla, Otoe County Field Guide(FG-1): 10 pp., size 8.5" x 11". Description: The outcrop near Unadilla is not obvious from the highway. Thus, it is not well known about geologists or rock hobbyists. The section contains marine limestone and shale and non-marine shale. Well preserved fossils are abundant in the limestone. Out of print, unbound color copies available.