Building Stones of Pennsylvania Avenue April 9, 2011

The buildings and monuments along the Avenue of the Presidents are faced with a variety of granites, marbles, and sandstones. We will start at the Federal Triangle Metro station and walk about 3 miles, examining the exteriors of various structures between the White House and the Capitol. We will discuss the geology and place of origin of the building stones, as well as explore aspects of political, cultural, and economic history related to the choice and use of material. All portions of our route will be paved. The pace set and distance covered on this geology field trip is typically faster and farther than our usual "naturalist's shuffle."