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Gray Fossil Site State Route 75 Drillholes

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"

Colors suggest color of material penetrated


Martin Kohl

(865) 594-5597