Information provided by the Tennessee Department of Transportation, from on-site auger drilling logged by geologist Larry Bolt.

Colors suggest color of material penetrated.

		Fill, recently emplaced during construction, usually reddish.
		Weathered, light gray or buff colored clay.
		Chert clasts.
		Carbonaceous material, lignite.
		Sandy, or sandy layers.
		Varved or layered clay.
		Reddish soil or subsoil, residual.
		"Boulder" interrupting the progress of drilling.
		Hole Terminated due to depth.
		Hole terminated due to "Refusal"