| State | Arkansas |
|---|---|
| Name | Wilcox Group |
| Geologic age | Early Eocene |
| Lithologic constituents |
Major
Unconsolidated > Fine-detrital (Bed)
Unconsolidated > Coarse-detrital > Sand (Bed)
Minor
Sedimentary > Coal (Bed)
Unconsolidated > Coarse-detrital > Gravel (Bed)
|
| Comments | Mainly interbedded sand, argillaceous sand, silt, clay, gravel and lignite. Approximate thickness is 1200 ft. in the Mississippi Embayment. Cyclic marine-nonmarine units formed in a fluvial-deltatic system. Some bauxite production in the Berger FM |
| Stratigraphic units | Includes Flour Island FM, Fort Pillow Sand, Old Breastworks Fm and Berger FM. |
| References | |
| NGMDB product | |
| Counties | Clark - Clay - Craighead - Dallas - Grant - Greene - Hempstead - Hot Spring - Lafayette - Lonoke - Miller - Nevada - Ouachita - Pulaski - Saline |