Browsing Maryland State Sheet Maps & State Map Series by Author "Hilleary, J.T."
Hilleary, J.T.; Otton, E.G. (Baltimore: Maryland Geological Survey, 1985)This map is Figure 5 from Otton. E.G., and Hilleary, J.T., “Maryland Strings – their Pphysical, Thermal and Chemical Characteristics”. Baltimore: Maryland Geological Survey, 1985 (Report of Investigations No. 42).