The Lee Creek Member is fine-grained dolomite that varies from tan to red brown and in places has a greenish cast. Glauconite, mostly in sand-sized grains, is common, especially near the top of the unit.
Bedding is thin and tends to be irregular.
Ind. It is discontinuously present north of Madison and is recognized in Decatur and Switzerland Counties. Apparently its relation to the underlying Brassfield proper varies from unconformable to conformable. This zone indicates an early Niagaran age in the North American standard.