Acid Rain and Our Nation's Capital: A Guide to Effects on Buildings and Monuments |
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acid precipitation acid rain air pollution AMERICAN STATES BUILDING ation crusts Black alteration crusts black crust blackened alteration Botanic Gardens building building show buildings and monuments built calcite matrix calcium carbonate Capitol Gatehouse carved details cleaned color column capitals composed of calcium Constitution Avenue Continue south Corcoran Gallery corner of 15th dedicated in 1922 dissolution dissolves edges effects of acid Federal Triangle feldspar fossil fragments granite Grant Memorial gypsum Jefferson Memorial limestone and marble limestone buildings Lincoln Memorial marble and limestone marble baluster marble balustrade marble bases Memorial Continental Hall Memorial-Site mica mineral composed Nation's capital northeast Organization of American Park Peace Monument Pennsylvania Avenue primarily composed pyrite RENWICK GALLERY roof overhang sandstone sheltered areas Silicate mineral inclusions southeast corner ST AVE ST ST ST ST stone buildings stone deterioration stone surface stone types sulfuric surrounding calcite tour tures U.S. Geological Survey volute walk north Washington Monument White House