Mineral Resources On-Line Spatial Data
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Geologic units in Montgomery county, Mississippi
- Zilpha formation and Winona formation (Eocene) at surface, covers 19 % of this area
Zilpha formation and Winona formation - (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.
- Tallahatta formation and Neshoba sand (Eocene) at surface, covers 49 % of this area
Tallahatta formation and Neshoba sand - (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.
- Kosciusko formation (Eocene) at surface, covers 4 % of this area
Kosciusko formation - (Claiborne group), irregularly bedded sand, clay, and some quartzite.
- Wilcox formation (Eocene) at surface, covers 28 % of this area
Wilcox formation - Irregularly bedded fine to coarse sand, more or less lignitic clay and lignite; includes bauxite bearing Fearn Springs sand member at base.