Mountain-building theory: The nineteenth-century origins of isostasy and the geosyncline / Dwight E. Mayo -- Evolving tectonic concepts of the central and southern Appalachians / Rodger T. Faill -- A basement of mlanges: A personal account of the circumstances leading to the breakthrough in Franciscan research / Kenneth J. Hs -- The Coon Butte Crater controversy / Ellen T. Drake -- Development of quantitative geomorphology / Marie Morisawa -- The history of American theories of cave origin / Richard A. Watson and William B. White -- Glacial geology and the North American craton: Significant concepts and contributions of the nineteenth century / Stanley M. Totten and George W. White -- Development of ideas about the Canadian Shield: A personal account / J. Tuzo Wilson -- Vestiges of a beginning / Preston Cloud -- James Hall's discovery of the craton / Robert H. Dott, Jr. -- E. O. Ulrich's impact on American stratigraphy / George Merk -- The Iowa landscapes of Orestes St. John / Jean C. Prior and Carolyn F. Milligan -- Dust in the wind: J. A. Udden's turn-of-the-century research at Augustana / William B. Hansen -- Ralph Stockman Tarr: Scientist, writer, teacher / William R. Brice -- L. R. Wager and the geology of East Greenland / C. K. Brooks -- Dr. Atl: Pioneer Mexican volcanologist / Winston Crausaz -- Joseph A. Cushman and the study of Foraminifera / Ruth Todd -- Wrong for the right reasons: G. G. Simpson and continental drift / Leo F. Laporte -- Surveying the geology of a vast, empty, cold country / W. O. Kupsch -- The G. William Holmes Research Station, Lake Peters, northeastern Alaska, and its impact on northern research / J. Thomas Dutro, Jr. -- Notes of a packer in the Idaho-Montana line survey, summer of 1899 / Ross R. Brattain -- Contributions of the state geological surveys: California as a case history / Gordon B. Oakeshott -- The role and development of the Smithsonian Institution in the American geological community / Ellis L. Yochelson -- Rummaging through the attic; Or, A brief history of the geological sciences at Yak / Brian J. Skinner and Barbara L. Narendra -- A history of geology at the University of Pennsylvania: Benjamin Franklin and the rest / Carol Faul -- A chronology from Mohole to JOIDES / Elizabeth N. Shor -- North American paleomagnetism and geology / John Verhoogen -- The early development of archaeological geology in North America / John A. Gifford and George Rapp, Jr. -- The anticlinal theory of oil and gas accumulation: Its role in the inception of the natural gas and modern oil industries in North America / John T. Galey -- Application as stimulus in geology: Some examples from the early years of the Geological Society of America / William M. Jordan -- Seismic exploration of the crust and upper mantle of the Basin and Range province / L. C. Pakiser -- The development of earthquake seismology in the western United States / Bruce A. Bolt -- Geology from space: A brief history of orbital remote sensing / Paul D. Lowman, Jr. -- Index