Numbers of sinkholes with minimum depth of 3m
based on Sutherland's digital analysis.
Click on cell for quadname and sinkhole count.
Based on 3x3 cells over a topo quad.
TN topo is about 60 sq miles,
so each cell is about 6.7 sq miles.
The highest density cell (153 sinkholes) is in the Talbott quadrangle.
See TN sinkholes