The Golden Valley Formation is a stratigraphic unit of Late Paleocene to Early Eocene age in the Williston Basin of North Dakota.

[1] The base of the Bear Den Member consists of kaolinitic claystone, mudstone and sandstone that weather to white, light grey, orange, and purple.

[1] The Camels Butte Member consists of montmorillonitic[3] and micaceous claystone, siltstone, lignite, poorly cemented sandstone and conglomerate.

[3] Deposition occurred during late Paleocene (Clarkforkian) to early Eocene (Wasatchian) time,[3] a period that spans the Paleocene-Eocene Thermal Maximum.

[3][4] Invertebrate fossils include shells of freshwater mollusks such as Viviparus, Unio, Hydrobia, and Planorbis, and the wing casing of a crabid beetle.