Quaternary geologic map of the Des Moines 4° x 6° quadrangle, United States / Department of the Interior, U.S. Geological Survey ; state compilations by George R. Hallberg [and others] ; edited and integrated by Gerald M. Richmond, David S. Fullerton, and Ann Coe Christiansen ; prepared in cooperation with the Iowa Geological Survey [and others].
Quaternary geologic atlas of the United States Miscellaneous investigations series ; map I-1420(NK-15) Quaternary geologic atlas of the United States. Miscellaneous investigations series (Geological Survey (U.S.)) ; map I-1420 (NK-15)
1 map : color ; 44 x 51 cm, on sheet 93 x 137 cm, folded in envelope 30 x 24 cm.
Relief shown by contours. "Compiled in 1982-83 and 1988." Includes text, index map, 3 ancillary maps: loess distribution and thickness, relationships of Late Wisconsin advances and still stands, and responsibility for state compilations, and sources of information.