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.
The Late Cretaceous Duwi Formation in Egypt overlies non-marine, varicolored shale of the middle Campanian Quseir Formation. It is conformably overlain by gray, laminated, foraminiferal-rich marine shale of the middle Maastrichtian Dakhla Formation. Detailed mineralogical and geochemical studies were carried out on the phosphate rocks of the Duwi Formation in Quseir-Safaga province (Geble Duwi Mine)...