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.

Script from the WBAP-TV/NBC station in Fort Worth, Texas relating a news story.

Script from the WBAP-TV/NBC station in Fort Worth, Texas relating a news story.

Script from the WBAP-TV/NBC station in Fort Worth, Texas, relating a news story.

Script from the WBAP-TV/NBC station in Fort Worth, Texas, relating a news story.

Script from the WBAP-TV/NBC station in Fort Worth, Texas, relating a news story.

Script from the WBAP-TV/NBC station in Fort Worth, Texas, relating a news story.

Script from the WBAP-TV/NBC station in Fort Worth, Texas, relating a news story.

Script from the WBAP-TV/NBC station in Fort Worth, Texas, relating a news story.

Script from the WBAP-TV/NBC station in Fort Worth, Texas, relating a news story.

Script from the WBAP-TV/NBC station in Fort Worth, Texas, relating a news story.

Script from the WBAP-TV/NBC station in Fort Worth, Texas, relating a news story.

Script from the WBAP-TV/NBC station in Fort Worth, Texas, relating a news story.

Script from the WBAP-TV/NBC station in Fort Worth, Texas, relating a news story.

Script from the WBAP-TV/NBC station in Fort Worth, Texas, relating a news story.

Letter from Fred C. Cole to Isaac H. Kempner discussing possible plans to see each other when the latter travels to Washington. The second page is a list of Isaac H. Kempner's classmates from Washington and Lee University.

Letter from Isaac H. Kempner to Fred C. Cole donating $500 and General Crude Oil Company of Houston stock to Washington and Lee University.

Letter from Isaac H. Kempner to Fred C. Cole discussing his plans in Washington and requesting information on the Washington and Lee University class of 1894.

Photograph of the back of George Washington's Mt. Vernon in Virginia, the historic home or George and Martha Washington. On the left of the image a line of people wait outside the home that is white with a brown roof and has multiple windows with dark shutters. A weather vane sits at the highest point of the roof in between two chimneys and a sundial sits at the center of a fenced off grassy area that more people walk around.

Photograph of a group of people standing on the walkway outside a science building of a University. The building is made of red brick, with three rows of windows, and has two ionic columns at the entrance. A second building can be seen to the side of the science building, slightly obscured by trees.

Photograph of four World War I cannons lined up in a row on the side of a road. A rock site between the cannons and the back half of a car is visible behind the cannons.

Letter from Irvin A. Hoff to Isaac H. Kempner discussing the availability and rates of A. Shapiro as a driver.

Letter from Harris K. Weston to Isaac H. Kempner discussing the latter's travel plans.

Letter from Albertina J. M. Ravenhorst to Isaac H. Kempner discussing transportation plans for the latter's upcoming trip.