insider.si.edu

Geologic map of the Annandale quadrangle, Fairfax and Arlington Counties, and Alexandria City, Virginia / by Avery Ala Drake, Jr. and Albert J. Froelich

Relief shown by contours and spot heights. "Contour interval 10 feet." "Crystalline rocks mapped by A.A. Drake, Jr. and A.E. Nelson, 1975-76 ; Cretaceous and younger rocks mapped by A.J. Froelich and ...
insider.si.edu

Geologic map of the Fairfax quadrangle, Fairfax County, Virginia / Department of the Interior, U.S. Geological Survey ; by Avery Ala Drake, Jr

Relief shown by contours and spot heights. ANAC copy 39088016329831 gift from George Walker. siris_sil_1070892 ...
Forbes

New Map Shows U.S. Geology In Unprecedented Detail

The Cooperative National Geologic Map offers a complete and detailed look at the bedrock and fault systems of the continental United States. The first geological map of the United States was published ...