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Ancient Lavas in Shenandoah National Park Near Luray, Virginia

Description: Abstract: In the Blue Ridge Province of northern Virginia, Maryland, and southern Pennsylvania, Lower Cambrian beds are underlain by a thick sequence of greenstone and interbedded sedimentary rocks known as the Catoctin Formation. An area near Luray, Va., was studied to determine the thickness of the formation, its relationship to overlying and underlying rocks, and the original nature of the lavas from which the Catoctin greenstone was derived. There the Catoctin Formation lies unconformably on granitic rocks. Its basal sedimentary layer ranges from a few inches to 150 feet in thickness and contains pebbles of underlying basement rocks. The erosion surface beneath the Catoctin is irregular, and in several places, hills as much as 1,000 feet high were buried beneath the Catoctin lavas. No important time break is indicated between the deposition of the Catoctin Formation and the overlying Cambrian sediments. The original Catoctin lavas were basaltic and were probably normal plateau basalts. Columnar joints, amygdules, sedimentary dikes, flow breccias, low-dipping primary joints, and other primary structures are well preserved.
Date: 1969
Creator: Reed, John Calvin, Jr.

Muscadine Grapes: A Fruit for the South

Description: This bulletin discusses the cultivation of muscadine grapes in the southern United States. Topics discussed include propagation, pruning and training, soil management, fertilizers, harvesting, common diseases, and varieties.
Date: 1961
Creator: United States. Agricultural Research Service. Crops Research Division.

Muscadine Grapes: A Fruit for the South

Description: Revised edition. This bulletin discusses the cultivation of muscadine grapes in the southern United States. Topics discussed include propagation, pruning and training, soil management, fertilizers, harvesting, common diseases, and varieties.
Date: 1965
Creator: United States. Agricultural Research Service. Crops Research Division.

Norfolk-Peninsula Area (ARMS-II)

Description: From Introduction: "The ARMS-II Norfolk - Peninsula area survey was one many that have been flown for the CETO since the nationwide ARMS program was started (1958). Figure 2 shows the location of the areas that have been completed to date. The purpose of the program is to measure the present environmental levels of gamma radiation in areas around nuclear facilities and planned nuclear activities."
Date: December 6, 1961
Creator: Guillou, R. B.