Summary of Early and Middle Pleistocene Glaciations in Northern Missouri, USA

Abstract

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.

Department(s)

Geography, Geology, and Planning

Document Type

Article

DOI

https://doi.org/10.1016/B978-0-444-53447-7.00043-X

Keywords

Cosmogenic-Isotope Burial Dates, Missouri, Pre-Illinoian

Publication Date

7-6-2011

Journal Title

Developments in Quaternary Science

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