01771oem 2200493Ia 450 991069883800332120101221110850.0(CKB)5470000002397487(OCoLC)334967137(EXLCZ)99547000000239748720090521d2007 ca engb||||||||||||||aa|||||durcn|||||||||crdrdacontentcrdamediacrrdacarrierGeologic map of the Frederick 30ʹ x 60ʹ quadrangle, Maryland, Virginia, and West Virginia[electronic resource] /by Scott Southworth ... [and others][Reston, Va.] :U.S. Dept. of the Interior, U.S. Geological Survey,2007.1 electronic map HTML, digital, PDF fileScientific investigations map ;2889Relief shown by contours and spot heights.Title from HTML index page (viewed on May 21, 2009).Accompanied by pamphlet (vi, 42 p.)Includes location map and 2 cross sections.Includes bibliographical references in pamphlet (pages 25-29).GeologyMarylandFrederick CountyMapsGeologyVirginiaLoudoun CountyMapsGeologyMarylandMontgomery CountyMapsMaps.lcgftGeologyGeologyGeologySouthworth Scott1387252Geological Survey (U.S.)GPOGPOGPOBOOK9910698838003321Geologic map of the Frederick 30ʹ x 60ʹ quadrangle, Maryland, Virginia, and West Virginia3436858UNINA