||"Base map from U.S. Geological Survey, 1951 (photorevised 1966) White Marsh quadrangle, 7 1/2 minute series." Relief shown by contours and spot heights. Additional maps on this quadrangle available on open file from Maryland Geological Survey. Includes quadrangle location maps. "Physiographic map of Baltimore County," block diagram, cross sections, text, and bibliographic references on some sheets.; Map 1. Geologic map of the White Marsh quadrangle, Maryland / by William P. Crowley, Juergen Reinhardt, and Emery T. Cleaves -- Map 2. Physiographic map of the White Marsh quadrangle, Maryland / by Emery T. Cleaves -- Map 3. Mineral resources and mined land inventory / by Karen R. Kuff.