Browsing Maryland State Sheet Maps & State Map Series by Subject "Cecil County (MD)--Geology--Maps"
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Simplifed Geologic Map of the Eastern Maryland Piedmont Showing the Location of the Baltimore-Washington Anticlinorium, Peach Bottom Syncline, and Tucquan Arch (Baltimore: Maryland Geological Survey, 1967)This map is Figure 1 from Southwick, D.L., Fisher, G.W., “Revision of Stratigraphic Nomenclature of the Glenarm Series in Maryland”. Baltimore: Maryland Geological Survey, 1967 (Report of Investigations No. 6).