Geologic units in Adams county, Mississippi

Pascagoula and Hattiesburg formation (Miocene) at surface, covers 56 % of this area

Green and bluish-green clay, sandy clay, and sand; gray siltstone and sand; locally fossiliferous.

Alluvium (Holocene) at surface, covers 23 % of this area

Loam, sand, gravel, and clay; mapped only in Mississippi River Alluvial Plain.

Catahoula formation (Miocene) at surface, covers 21 % of this area

Irregularly bedded gray sand and sandstone; mottled red and gray, green, and chocolate-colored clay; some quartzite, and some gravel; the Paynes Hammock sand, sandy limestone cross-bedded fine green sand, and thin-bedded sand and clay, is mapped with the underlying Chickasawhay limestone in eastern MS.

Natural Levees (Holocene) at surface, covers 0.1 % of this area

Gray and brown silt, silty clay, some very fine sand, reddish brown along the Red River.

Alluvium (Holocene) at surface, covers < 0.1 % of this area

Gray to brownish gray clay and silty clay, reddish brown in the Red River Valley, some sand and gravel locally.