Summary of Early and Middle Pleistocene Glaciations in Northern Missouri, USA
Northern Missouri, USA was glaciated five times prior to the Illinoian (penultimate) glaciation. Cosmogenic-isotope burial dates show that tills with reversed magnetic polarity were deposited at about 2.4 and 1.3 Ma during the Early Pleistocene. Three younger tills with normal magnetic remanence reached the same approximate latitude of 39° during the Middle Pleistocene. The oldest of these normal-polarity tills has a burial age that is indistinguishable from the Matuyama/Bruhnes transition at 0.78 Ma. Two younger tills were deposited between ~0.2 and 0.4 Ma, but the uncertainty in these dates remains large. © 2011 Elsevier B.V.
Geography, Geology, and Planning
Cosmogenic-Isotope Burial Dates, Missouri, Pre-Illinoian
Rovey II, Charles W., and Greg Balco. "Summary of early and middle Pleistocene glaciations in northern Missouri, USA." In Developments in quaternary sciences, vol. 15, pp. 553-561. Elsevier, 2011.
Developments in Quaternary Science