الفهرس 
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Abstract
The northwestern coastal plain of Egypt is characterized by a series of at least nine
elongated parallel Quaternary beach Ridges, extend along the Mediterranean coast (Shukri et
I’ aI., 1956; Butzer, 1960; El Shazly et aI., 1964; Selim, 1974; Hassouba, 1980; El Asmar, 1991;
Holail, 1993; Mansour, 1999; Sediek and Rashed, 2004; and Zahran, 2008). They increase in
elevation from the most seaward coastal Ridge (which is lowest and border the present coast
with altitude of less than ten meters) to the most inland Ridge (which is highest and has
altitude of about one hundred meters). These Ridges are dominated by dunal carbonates
which differ not only in their primary composition but also in their distinct grades of meteoric
water diagenesis. Oolitic facies dominates the younger eolianites of the first and second
Ridges. Bioclastic facies with abundant coralline algae, benthonic foraminifers, molluscs,
echinodenns and intraclasts represents the major rock type in the older eolianites (El-Shahat,
1995). Therefore, these Quaternary carbonate rocks are excellent examples of the different
stages of diagenesis.