This report represents conclusions of studies of one segment in the continuing research effort for the better understanding of the formation, stratigraphy, and associated mineral resources of the Mississippi coastal and near-shore areas by putting them in a regional framework and comparing them with adjacent areas of the northern gulf coast region. Understanding the Mississippi coastal quaternary, in addition, will greatly help in defining it firmly, by delineating it from underlying late neogene units, with their own important ground water and potential hydrocarbon and heavy mineral resources. The present study compares the Mississippi quaternary units with the apalachicola sedimentary sequence, the best developed in the vicinity east of the Mississippi-Alabama coastal segment. The study results presented here will be supplemented by results of ongoing geological (sedimentary-stratigraphic) research, including additional maps and cross sections, to illustrate the detailed late neogene and quaternary stratigraphy and mineral-sediment resources of the Mississippi-Alabama and the correlated apalachicola area. Our drill information, presented here on both subject areas, has already been utilized by state agencies.