Geologic units in Carroll county, Mississippi

Additional scientific data in this geographic area

Kosciusko formation (Eocene) at surface, covers 61 % of this area

(Claiborne group), Irregularly bedded sand, clay, and some quartzite.

Zilpha formation and Winona formation (Eocene) at surface, covers 20 % of this area

(Claiborne group), Zilpha clay, chocolate-colored clay containing some glauconitic sand, not recognized north of Yalobusha River; Winona sand, highly glauconitic sand, more or less clayey.

Alluvium (Holocene) at surface, covers 8 % of this area

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

Cook Mountain formation (Eocene) at surface, covers 6 % of this area

(Claiborne group), Southeast of Pearl River, marl, limestone, glauconitic sand, and chocolate-colored clay; northwest of Pearl River, predominantly chocolate-colored clay with some glauconitic sand.

Tallahatta formation and Neshoba sand (Eocene) at surface, covers 4 % of this area

(Claiborne group), Southeast of Pearl River predominantly more or less glauconitic claystone and clay with lenses of sand and some sandstone; highly cross-bedded sand at base; northwest of Pearl river predominantly sand, locally glauconitic, containing claystone and clay lenses and abundant clay stringers; Neshoba sand, sparingly glauconitic fairly coarse sand not recognized southeast of Newton County or north of Yalobusha River.

Cockfield (Eocene) at surface, covers 1 % of this area

(Claiborne group), Irregularly bedded, more or less laminated liginitic clay, sand, and lignite; sparingly glauconitic.