Building stones of Baltimore, the Monumental City
Joseph T. Hannibal, David W. Bolton, 2015. "Building stones of Baltimore, the Monumental City", Tripping from the Fall Line: Field Excursions for the GSA Annual Meeting, Baltimore, 2015, David K. Brezinski, Jeffrey P. Halka, Richard A. Ortt, Jr.
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Baltimore, the Monumental City, was founded in 1729. One of the oldest large cities in the United States, it has had a long history of stone use. This chapter discusses the stone used for a number of iconic Baltimore monuments and buildings, including the Battle Monument, the Washington Monument, the neo-classical Basilica of the Assumption, the neo-Gothic Mount Vernon Place United Methodist Church, Transamerica Tower (Baltimore’s tallest building), and a number of other structures, providing an overview of the major stone types used in the city during the nineteenth and twentieth centuries. The general trend over this time is a shift from use of local and regional stone to use of stone from a variety of sources, including stone from Europe and Asia. This trend is most apparent in stone used for building exteriors. The various stones used have different properties, which affect their susceptibility to weathering. These include serpentinites, marbles, and brownstones that are particularly prone to weathering.
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Prepared in conjunction with the 2015 GSA Annual Meeting in Baltimore, Maryland, this volume contains guides to field trips in this historic region. Emanating from the Fall Line city of Baltimore, these trips reflect the diversity of geological features in the mid-Atlantic region including the Piedmont, Appalachian Mountains, and Coastal Plain, and the importance of geology on the development and construction of the Baltimore-Washington, D.C., metropolitan area. Trips to the core of the Appalachian orogen concern themselves with the tectonic and metamorphic history, early Paleozoic carbonate platform development, Devonian paleoclimate, and coal-mine fire hazards. Excursions to the Coastal Plain examine various aspects of Cenozoic stratigraphy, structure, barrier island formation, and wetland and ecosystem development. A variety of trips also explore urban geology, including building and monument stones of Baltimore and Washington, D.C., urban hydrogeology, and Civil War battlefield geology.