Gray Fossil Site State Route 75 Drillholes
Fill, recently emplaced during construction, usually reddish
Weathered, light gray or buff colored clay
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"
Information provided by the Tennessee Department of Transportation, from on-site auger drilling logged by geologist Larry Bolt.
Colors suggest color of material penetrated.