Midway Group

Midway Group
State Arkansas
Name Midway Group
Geologic age Paleocene
Lithologic constituents
Unconsolidated > Fine-detrital > Clay (Bed)
Unconsolidated > Marl (Bed)
Unconsolidated > Coarse-detrital > Sand
Sedimentary > Carbonate > Limestone (Bed)
Comments Mainly clay, calcareous clay (marl), sandy clay, calcareous sandstone and glauconitic limestone. Approximatly 640 ft. thick. Marine fossils are common. Marl refers to loosley consolidated calcareous clays, silts and sands containing glauconite
Stratigraphic units Includes Porter Creek Clay and Clayton Formation.
NGMDB product
Counties Clark - Hempstead - Hot Spring - Jackson - Lonoke - Miller - Nevada - Pulaski - Saline