The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Nearly identical sequences of pre-Illinoian glacial till are present throughout the north–central United States in Iowa, Nebraska and Missouri. In each of these states three tills with normal magnetic remanence have been found above two - three tills with reversed remanence, and the lithologic differences among successive tills are nearly the same. Each till is capped by a mature paleosol, except...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.