| | Date | Description | Links | MSA Citation |
| Details | 2004 | Brezinski, D.K., 2004, Karst Features Map of the Catoctin Furnace Quadrangle, Frederick County, Maryland: Baltimore, Md., Maryland Geological Survey File CATOCKST2004.1, 1 sheet, scale 1:24,000. | | SE84-1 |
| Details | 2004 | Brezinski, D.K., 2004, Karst Features Map of the Walkersville Quadrangle, Frederick County, Maryland: Baltimore, Md., Maryland Geological Survey File WALKEKST2004.1, 1 sheet, scale 1:24,000. | | SE84-2 |
| Details | 2004 | Brezinski, D.K., 2004, Karst Features of Part of the Point of Rocks Quadrangle, Frederick County, Maryland: Baltimore, Md., Maryland Geological Survey File PTOFRKST2004.1, 1 sheet, scale 1:24,000. | | SE84-3 |
| Details | 2004 | Brezinski, D.K., 2004, Karst Features of the Frederick Quadrangle, Frederick County, Maryland: Baltimore, Md., Maryland Geological Survey File FREDEKST2004.1, 1 sheet, scale 1:24,000. | | SE84-4 |
| Details | 2004 | Brezinski, D.K., 2004, Karst Features of the Woodsboro Quadrangle, Frederick and Carroll Counties, Maryland: Baltimore, Md., Maryland Geological Survey File WOODSKST2004.1, 1 sheet, scale 1:24,000. | | SE84-5 |