ABSTRACT: Petrologic Discrimination Between the Neogene Formations in Adams and Wilkinson Counties, Southwestern Mississippi

RHINEHART, KENNETH F., and MAURICE A. MEYLAN, Department of Geology, University of Southern Mississippi, Hattiesburg, MS

The outcropping Neogene sediments of Adams and Wilkinson Counties, Mississippi, include the Miocene(?) Hattiesburg Formation, the Pliocene-Pleistocene(?) Citronelle Formation, the Pleistocene Natchez Formation, and Quaternary terrace deposits, overlain by a now erosionally dissected loess blanket that thins eastward away

from the Mississippi River. These units can be distinguished both on the basis of outcrop characteristics (which were used to identify them in the field) and petrologic parameters (which may be useful for determining lithostratigraphic relationships between units during detailed geologic mapping, as well as for identifying units in the subsurface).

AAPG Search and Discovery Article #91014©1992 AAPG GCAGS and GC-SEPM Meeting, Jackson, Mississippi, October 21-23, 1992 (2009)