Ruhe (1983) Depositional environment of late Wisconsin loess in the midcontinental United States. In: Wright and Porter (Eds.), Late-Quaternary Environments of the United States, The Late Pleistocene, Vol. 1, University of Minnesota Press, Minneapolis, p. 130–137 // Bettis et al. (1996) Hogs, Bogs, and Logs: Quaternary Deposits and Environmental Geology of the Des Moines Lobe. Iowa Department of Natural Resources, Geological Survey Bureau Guidebook Series no. 18, 170 p. per Dalton et al. 2020-An Updated Radiocarbon-Based Ice Margin….

Ruhe (1983) Depositional environment of late Wisconsin loess in the midcontinental United States. In: Wright and Porter (Eds.), Late-Quaternary Environments of the United States, The Late Pleistocene, Vol. 1, University of Minnesota Press, Minneapolis, p. 130–137 // Bettis et al. (1996) Hogs, Bogs, and Logs: Quaternary Deposits and Environmental Geology of the Des Moines Lobe. Iowa Department of Natural Resources, Geological Survey Bureau Guidebook Series no. 18, 170 p. per Dalton et al. 2020-An Updated Radiocarbon-Based Ice Margin….

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