|Description||The geology of the Frederick 30 by 60 minute quadrangle, Maryland, Virginia, and West Virginia, was mapped on 1:24,000-scale base maps from 1989 to 1994. The geologic data were manually compiled at 1:100,000-scale in 1997 and were digitized and converted|
|Originators||Southworth, C. Scott; Brezinski, David K.; Drake, Avery Ala, Jr.; Burton, William C.; Orndorff, Randall C.; Froelich, Albert J.; Daniels, David L.; Reddy, James E.; and Denenny, Danielle|
|Publication||U.S. Geological Survey Open-File Report 02-437|
Polygon delineating the planimetric area of a landslide found in coverages whose names begin with ls, ols, or yls
|LS||Some regions within landslides were apparently unaffected by the landslide (that is, they represent areas bypassed by the landslide but are within its outer boundaries) This attribute is used to distinguish those areas from the landslide itself.|
Polygon in the mm coverages, used to indicate the method by which landslides were identified, found in coverages whose names begin with mm.