The geology of the Powder Mill Ferry 7 1/2-minute
quadrangle ,
Shannon and Reynolds Counties, Missouri was mapped from
1997 through 1998 as part of the Midcontinent Karst Systems
and Geologic
Mapping Project, Eastern Earth Surface Processes Team. The
map supports the production of a geologic framework that
will be used in hydrogeologic investigations related to
potential lead and zinc mining in the Mark Twain National
Forest adjacent to the Ozark National Scenic Riverways
(National Park Service). Digital geologic coverages will be
used by other federal and state agencies in hydrogeologic
analyses of the Ozark karst system and in ecological models.