Condra, G. E., Upp, J. E., 1933. The Red Oak-Stennett-Lewis Traverse of Iowa (with implications for Nebraska) (GSP-3): 23 pp., size 6" x 9". Description: This report is based on a study of the Pennsylvanian beds exposed in the Nishnabotna Valley in Iowa, between 1.5 miles northwest of Red Oak and about 2 miles northeast of Lewis, a distance of about 25 miles. The southern part of our traverse is on the south flank of the Jones Point Deformation, which is known as the Redfield anticline. The section north of Griswold is thought to be in the Bartlett syncline and the one at Lewis is located where the strata lift northwestward from this syncline.