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Notes I include each chapter’s major sources.Where possible I have listed internet links. Sugar Creek Geological information on karst can be found in a lengthy article posted by the United States Department of the Interior,“Engineering Aspects of Karst” in National Atlas of the United States, http://www.nationalatlas.gov/articles/geology/a_karst.html (accessed November 7,2009).The shorter Karst: Virginia Natural Heritage Karst Program, Cave and Karst Protection, Virginia Department of Conservation and Recreation, appears online at http://www.dcr.virginia.gov (accessed November 7, 2009). Charles A. Grymes discusses “Wind Gaps and Stream Piracy,” at Virginia Places, http://www.virginiaplaces.org/ (accessed November 7,2009). Rock Crystals Thegeologydepartmentof WilliamandMaryprovidesadetailedlookof thestate’sgeology in “The Geology of Virginia,” online at http://web.wm.edu/geology/Virginia (accessed November 7, 2009). Richard Stoiber, Carl Tolman, and Robert Butler give an overview of the importance of quartz crystals during World War II. Their “Geology of Quartz Crystal Deposits” appears in American Mineralogist 30 (May 1945), online at http://www.minsocam.org/msa/collectors_corner/amtoc/toc1945.htm (accessed November 7,2009). The Shenandoah Sea Many editions of Thomas Jefferson’s 1781 Notes on the State of Virginia exist, including one online at http://etext.virginia.edu/toc/modeng/public/JefVirg.html (accessed November 7, 2009). The geology department of the College of William and Mary provides a detailed look at the state’s geology in “The Geology of Virginia,” http://web .wm.edu/geology/Virginia (accessed November 7, 2009). Keith Frye’s The Roadside Geology of Virginia (Missoula,Mt.:Mountain Press Publishing Company,1986) is a portable guide to rock formations you can see from your car. Founded by Young Earth Creationist Henry M.Morris,the Museum of Creation and Earth History in California,online at http://www.lifeandlightfoundation.org (accessed November 7, 2009), and Kentucky’s more recent Creation Museum,http://www.creationmuseum.org (accessed November 7, 2009), both argue for a literal interpretation of Genesis. Morris is co-author with John Whitcomb of The Genesis Flood: The Biblical Record and Its Scientific Implications (Phillipsburg , N.J.: Presbyterian & Reformed Publishing, 1961), a Creationist text popular with 118 NOTES Fundamentalist Christians. Ronald L. Numbers’s The Creationists: From Scientific CreationismtoIntelligentDesign (Cambridge:HarvardUniversityPress,2006)isanacademic examination of the history of antievolutionary thought. Caves Geological information on karst can be found in a lengthy article posted by the United States Department of the Interior,“Engineering Aspects of Karst” in National Atlas of the United States, http://www.nationalatlas.gov/articles/geology/a_karst.html (accessed November 7,2009).The shorter Karst: Virginia Natural Heritage Karst Program, Cave and Karst Protection, Virginia Department of Conservation and Recreation, appears at http://www.dcr.virginia.gov (accessed November 7, 2009). The National Karst Map, an ongoing project by, among others, the U.S. Geological Survey and the U.S. Fish and Wildlife Service also discusses karst topography, online at http://www.nature.nps.gov/ nckri/map/project/index.html (accessed November 7, 2009). Both the Rockbridge County cave planarian (Sphalloplana virginiana) and the Rockbridge County cave amphipod (Stygobromus baroodyi) are of concern to the U.S.Fish and Wildlife Service,according to Threatened, Endangered, and Special Concern Aquatic Species, an online study of the Southern Appalachian Cooperative Ecosystem Studies Unit, at http://cesu.utk.edu/ documents/ (accessed November 7,2009). Rock Castles The Division of Geology and Mineral Resources publishes geological maps and booklets detailing the geology of individual counties and quadrants within counties,including K. F.Bick, Geology of the Lexington Quadrangle, Virginia (Charlottesville:Division of Mineral Resources, 1960); S. J. Kozak, Geology of the Millboro Quadrangle, Virginia (Charlottesville : Division of Mineral Resources, 1965); and Gerald P. Wilkes, Edgar W. Spencer, Nick H. Evans, and Elizabeth V. M. Campbell, Geology of Rockbridge County, Virginia (Charlottesville: Division of Mineral Resources, 1977). A discussion of Ice Age talus slopes visible from the interstate appears in Glimpses of the Ice Age from I-81, Geologic Wonders of the George Washington and Jefferson National Forests,No.1 in a series,Lee Ranger District, U.S. Department of Interior, U.S. Geological Survey, U.S. Department of Agriculture Forest Service, Southern Region, 1998, http://pubs.usgs.gov/gip/ (accessed November 7,2009). The Natural Bridge Many editions of Thomas Jefferson’s 1781 Notes on the State of Virginia exist, including one online at http://etext.virginia.edu/toc/modeng/public/Jef Virg.html (accessed November 7, 2009). The Natural Bridge Web site, http://www.naturalbridgeva.com/ bridge.html...

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