U.S. Geological Survey
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
GEOLOGY THEME STUDY Page 1
NATIONAL HISTORIC LANDMARKS Dr. Harry A. Butowsky GEOLOGY THEME STUDY Page 1 Geology National Historic Landmark Theme Study (Draft 1990) Introduction by Dr. Harry A. Butowsky Historian, History Division National Park Service, Washington, DC The Geology National Historic Landmark Theme Study represents the second phase of the National Park Service's thematic study of the history of American science. Phase one of this study, Astronomy and Astrophysics: A National Historic Landmark Theme Study was completed in l989. Subsequent phases of the science theme study will include the disciplines of biology, chemistry, mathematics, physics and other related sciences. The Science Theme Study is being completed by the National Historic Landmarks Survey of the National Park Service in compliance with the requirements of the Historic Sites Act of l935. The Historic Sites Act established "a national policy to preserve for public use historic sites, buildings and objects of national significance for the inspiration and benefit of the American people." Under the terms of the Act, the service is required to survey, study, protect, preserve, maintain, or operate nationally significant historic buildings, sites & objects. The National Historic Landmarks Survey of the National Park Service is charged with the responsibility of identifying America's nationally significant historic property. The survey meets this obligation through a comprehensive process involving thematic study of the facets of American History. In recent years, the survey has completed National Historic Landmark theme studies on topics as diverse as the American space program, World War II in the Pacific, the US Constitution, recreation in the United States and architecture in the National Parks. -
This Dynamic Earth [USGS]
View of the planet Earth from the Apollo spacecraft. The Red Sea, which separates Saudi Arabia from the continent of Africa, is clearly visible at the top. (Photograph courtesy of NASA.) Contents Preface Historical perspective Developing the theory Understanding plate motions "Hotspots": Mantle Some unanswered questions Plate tectonics and people Endnotes thermal plumes Ordering Instructions This book was originally published in paper form in February 1996 (design and coordination by Martha Kiger; illustrations and production by Jane Russell). It is for sale from: U.S. Government Printing Office Superintendent of Documents, Mail Stop SSOP Washington, DC 20402-9328 or it can be ordered directly from the U.S. Geological Survey: Call toll-free 1-888-ASK-USGS Or write to USGS Information Services Box 25286, Building 810 Denver Federal Center Denver, CO 80225 303-202-4700; Fax 303-202-4693 ISBN 0-16-048220-8 Version History Version 1.14 The online edition contains all text from the original book in its entirety. Some figures have been modified to enhance legibility at screen resolutions. PDF Version You can download a Portable Document Format version of This Dynamic Earth [3.6 MB]. Get the free Adobe Reader. Linked Websites Please visit the Smithsonian Institution This Dynamic Planet website. This site provides interactive mapping functions (including zoom), contains additional information not shown on the printed paper map, and includes downloadable PDF files of all map components and HTML pages. See also This Dynamic Planet, the map showing the Earth's physiographic features, current plate movements, and locations of volcanoes, earthquakes, and impact craters. -
Richard Doell Was a Kind and Gentle Man of Many Talents
Richard R. Doell 1923–2008 A Biographical Memoir by G. Brent Dalrymple ©2016 National Academy of Sciences. Any opinions expressed in this memoir are those of the author and do not necessarily reflect the views of the National Academy of Sciences. RICHARD RAYMAN DOELL June 28, 1923–March 6, 2008 Elected to the NAS, 1969 Richard Doell was a kind and gentle man of many talents. He earned a bachelor’s degree in 1952 and a doctorate in 1955, both of them in geophysics, from the University of California, Berkeley. Introduced to paleomagnetism by his mentor, John Verhoogen, Richard went on to become a pioneer in that discipline. With his close colleague Allan Cox he founded the Rock Magnetics Laboratory (RML) at the U.S. Geological Survey in Menlo Park, CA, and he published many seminal papers on geomagnetic rever- sals, field intensity, behavior of the non-dipole field, and rock magnetism. A veritable genius at mechanical design, Janet Doell. Photograph courtesy Richard invented most of the new and novel equipment and techniques that were critical to the success of the RML. By G. Brent Dalrymple Richard, Allan, and their colleague Brent Dalrymple proved conclusively that Earth’s magnetic field had reversed in the past, and they determined the time scale of geomagnetic reversals for the last four million years. This time scale helped prove sea-floor spreading, which led to the theory of plate tectonics and revolutionized our knowledge of how the planet works. For his important work, Richard was elected to the NAS in 1969 and received the Vetlesen Prize in 1971.