Geology of Tennessee

View a generalized geologic map of the state and learn about the Tennessee state symbols related to geology: the state rock, gem, mineral, and fossil.

Tennessee has a rich history of mining dating back to the late 18th century. Tennessee mines the second greatest variety of mineral resources of any state east of the Mississippi River (behind North Carolina).

Updated 01-2020

The Gray Fossil Site is located in Washington County near the community of Gray, Tennessee. Tennessee Department of Transportation geologist Larry Bolt first noticed the unusual geology in excavations during the realignment and widening of State Route 75.

These photomosaics were made during construction of the new alignment of State Route 52 between Celina and the Overton County line. They include interpretations of deep water channels filled with crinoidal limestone that are excellent examples of point bar-like deposits in a deep water setting.