Little Natches Member of Cook Mountain Formation of Claiborne Group (LA)
early Tertiary (middle Eocene)
Type section: southwest corner of NE/4 NE/4 sec. 15, T. 9 N., R. 6 W., Winn Parish, along U.S. Highway 71, about 0.25 mi southeast of Little Natches Bayou, northwestern LA (Huner, 1939).
Arkla basin
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