|Geologic age||Late Eocene|
Unconsolidated > Marl (Bed)
Unconsolidated > Coarse-detrital > Sand (Bed)
Unconsolidated > Fine-detrital > Silt (Bed)
|Comments||Mainly marl- fossiliferous calcareous glauconitic clay/interbedded with fossiliferous argillaceous sand and silty clay. White Bluff FM dominates over Redfield FM in thickness and extent. Transgressional marine-nonmarine sequence. Marl refers to loosley consolidated calcareous clays, silts and sands containing glauconite. Includes White Bluff FM (marine)- Caney Point member, Pastoria Sand member, Rison Clay member and Redfield FM (nonmarine) fossiliferous lignitic silt and sand.|
|Stratigraphic units||White Bluff Formation, Caney Point member, Pastoria Sand member, Rison Clay member, and Redfield Formation|
Wilbert, L.J. Jr. 1953, The Jacksonian Stage in southeastern Arkansas: Ark. Res. Devel. Comm., Div. Geology Bull. 19, 125 pp.
|Counties||Ashley - Bradley - Cleveland - Drew - Grant - Jefferson - Lincoln|