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​Location: The dam and spillway are about an hour north of Dallas, just above Denison, TX. From the parking area by the dam, walk west along the lake shore.

What you can find: In the soft marl layers, look for shark's teeth, oysters, and other shelled fossils. In the white limestone, you will find quite large ammonites.

Locality Type: Lakeshore

Equipment Needed: ​Rock pick

Additional Information:  Cretaceous era, Duck Creek formation.

Recommended Reading: 

A Field Guide to Fossils of Texas

Roadside Geology of Texas

Gem Trails of Texas

Rockhounding Texas

Map Location