by D.A. Hubbard, Jr., folded 40 x 35-inch limited color 1:250,000-scale map and text, 2001. Sinkholes, cave entrances, springs, and stream insurgences are plotted on a map of the Valley and Ridge province west of 81-degrees of longitude with karst areas subdivided into 5 carbonate units. Text describes karst and karst hazards with photographic illustrations of some karst features and hazards.
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