Molding sand is found on and near the bluffs east and southeast of the larger stream valleys or of large curves in these valleys. It is also found on the upland in interstream areas in Benton, Cedar and in a few other counties. It occurs chiefly in deposits believed to be eolian and some of these are in the form of ancient dunes now covered with soil. Part of the molding sand in some of these old dunes is a residual mixture.
Proceedings of the Iowa Academy of Science
©1925 Iowa Academy of Science, Inc.
Smith, John E.
"Molding Sand in Eastern Iowa,"
Proceedings of the Iowa Academy of Science, 32(1), 357-358.
Available at: https://scholarworks.uni.edu/pias/vol32/iss1/63