Harlow, George E., Jr., 2001, Appraisal of the Northern Shenandoah Valley Carbonate Aquifer System, Frederick County, Virginia [PDF file 3.2 MB], Source Water Protection in Karst: Delineation, Policy, and Management Workshop, Lord Fairfax Community College, Middletown, Va. (Note: this poster is 42" x 62" and is not printable on a standard letter-sized printer; it can be viewed in ADOBE Acrobat). 

Orndorff, R.C., Epstein, J.B., and McDowell, R.C., 1999, Geologic map of the Middletown quadrangle, Frederick, Shenandoah, Warren Counties, Virginia: U.S. Geological Survey, Geologic Quadrangle Map GQ-1803, scale 1:24000.

Orndorff R.C., Epstein J.B., Weary D.J., and Harlow G.E., 2001, Geologic aspects of karst in the Appalachians [abs.]: Appalachian Region Workshop, Gatlinburg, Tennessee, October 2001.

Orndorff, Randall C. and Harlow, George E., Jr., 2002, FIELD TRIP GUIDE, Hydrogeologic framework of the Northern Shenandoah Valley carbonate aquifer system, in Kuniansky, Eve L., ed., U.S. Geological Survey Karst Interest Group Proceedings, Shepherdstown, West Virginia, August 20-22, 2002: U.S. Geological Survey Water-Resources Investigations Report 02-4174, pp. 81-89. [PDF file-667 KB]

Orndorff, R.C., Weary, D.J., and Parker, R.A., 2003, Geologic map of the Winchester quadrangle, Frederick County , Virginia : U.S. Geological Survey Open-File Report 03-461, CD-ROM.

Weary, David J., Doctor, Daniel H., Orndorff, Randall C., and Harlow, George E., Jr., 2007, Structural Control of Spring Locations in the Northern Shenandoah Valley, Virginia and West Virginia: Interpretation of Geologic Controls on Ground-Water Flow Paths in Folded and Faulted Carbonate Rocks [abs.]: 2007 Southeastern Section-56th Annual Meeting (29-30 March 2007), Geological Society of America Abstracts with Programs, Vol. 39, No. 2, p. 99.

Weary, David J., Doctor, Daniel H., Orndorff, Randall C., and Harlow, George E., Jr., 2007, Structural Control of Spring Locations in the Northern Shenandoah Valley, Virginia and West Virginia: Interpretation of Geologic Controls on Ground-Water Flow Paths in Folded and Faulted Carbonate Rocks [PDF file ], Geologic Maps, Digital Geologic Maps, and Derivatives from Geologic Maps (Posters), 2007 Southeastern Section-56th Annual Meeting (29-30 March 2007), Geological Society of America. (Note: this poster is composed of two pages, Page 1 is 42" x 52" [PDF file 23.8 MB], Page 2 is 42" x 48" [PDF file 33.9MB], and is not printable on a standard letter-sized printer; it can be viewed in ADOBE Acrobat).

Weary, David J., Harlow, George E., Jr., Orndorff, Randall C., and Aleman-Gonzalez, Wilma, 2004, Interdisciplinary Cooperative Geologic Mapping and Ground-Water Resource Analysis of Frederick County, Virginia by the U.S. Geological Survey [abs.]: 2004 Denver Annual Meeting (November 7-10, 2004), Geological Society of America Abstracts with Programs, Vol. 36, No. 5, p. 578.

Weary, David J., Harlow, George E., Jr., Orndorff, Randall C., and Aleman-Gonzalez, Wilma, 2004, Interdisciplinary Cooperative Geologic Mapping and Ground-Water Resource Analysis of Frederick County, Virginia by the U.S. Geological Survey [PDF file 44.7 MB], Geological Mapping: Providing for Successful Water and Land Resource Planning (Posters), 2004 Denver Annual Meeting (November 7-10, 2004), Geological Society of America. (Note: this poster is 42" x 72" and is not printable on a standard letter-sized printer; it can be viewed in ADOBE Acrobat).

Weary, D.J., Orndorff, R.C., and Aleman-Gonzalez, W., 2006, Geologic map of the Stephens City  quadrangle, Clarke, Frederick, and Warren Counties, Virginia : U.S. Geological Survey Open-File Report 2006-1173, scale 1:24,000.