Metallogenic map of zinc, lead, and barium deposits and occurrences in Paleozoic sedimentary rocks, east-central United States

Online link http://ngmdb.usgs.gov/Prodesc/proddesc_9906.htm
Description A descriptive compilation of 545 zinc, lead, and barium districts, deposits, and occurrences in Paleozoic sedimentary rocks in the eastern midwest states.
Originators Clark, Sandra H. B.
Publication U.S. Geological Survey Miscellaneous Investigations Series Map 1773