• Schultz, C. H., editor, The Geology of Pennsylvania, Special Publication 1, 888 pp., Pennsylvania Geological Survey and Pittsburg Geological Society, Harrisburg and Pittsburg, 1999.
This comprehensive volume covers all facets of the state’s geology: stratigraphy, tectonics, geologic history, mineral resources, and more. Reprinted in 2002, it may be ordered from the state Geological Survey.
• Van Diver, B. B., Roadside Geology of Pennsylvania, 352 pp., Mountain Press, Missoula, Montana, 1990.
• Geyer, A. R., and W. H. Bolles, Outstanding Scenic Features of Pennsylvania, Environmental Geology Report 7, 508 pp., Bureau of Topographic and Geologic Survey, Harrisburg, 1979.
This book lists some of the geologic sites of interest in the state. Directions and maps are provided, but descriptions are brief. Features in the Philadelphia region include hills, cliffs, boulder fields, and marshes.
• The Pennsylvania Topographic and Geologic Survey offers numerous publications and maps; visit their web site.
• Newman, B., L. Newman, Hikes Around Philadelphia, 200 pp., Temple University Press, Philadelphia, 1997.
Directions, hiking trails, and other information for some of the geologic features on this site are provided in this book.
Last revised: 12 September 2016