Sum of depths of sinkholes with minimum depth of 3m based on Sutherland's digital analysis. Click on cell for quadname and depth metric (meters). Based on 3x3 cells over a topo quad. TN topo is about 60 sq miles, so each cell is about 6.7 sq miles.
200+

100-200
10-100

1-10
See TN sinkholes
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