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Gray Fossil Site State Route 75 Drillholes

Fill

Fill, recently emplaced during construction, usually reddish

Weathered

Weathered, light gray or buff colored clay

geology_gray_chert

Chert clasts

Carb

Carbonaceous material, lignite

geology_gray_sandy

Sandy, or sandy layers

Varved

Varved or layered clay

Soil

Reddish soil or subsoil, residual

Boulder

"Boulder" interrupting the progress of drilling

Terminated

Hole Terminated due to depth

geology_gray_refusal

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.

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Contacts

Martin Kohl

(865) 594-5597
Martin.Kohl@tn.gov