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Two-Dimensional Computer Simulation of Hypervelocity Impact Cratering: Some Preliminary Results for Meteor Crater, Arizona

Description: A computational approach used for subsurface explosion cratering was extended to hypervelocity impact cratering. Meteor (Barringer) Crater, Arizona, was selected for the first computer simulation because it is one of the most thoroughly studied craters. It is also an excellent example of a simple, bowl-shaped crater and is one of the youngest terrestrial impact craters. Initial conditions for this calculation included a meteorite impact velocity of 15 km/s, meteorite mass of 1.67 x 10/sup 8/ kg… more
Date: June 1978
Creator: Bryan, J. B.; Burton, D. E.; Cunningham, M. E. & Lettis, L. A., Jr.
Item Type: Refine your search to only Article
Location: None
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Carbonaceous Aerosol Particles From Common Vegetation in the Grand Canyon

Description: The problem of visibility reduction in the Grand Canyon due to fine organic aerosol particles in the atmosphere has become an area of increased environmental concern. Aerosol particles can be derived from many emission sources. In this report, we focus on identifying organic aerosols derived from common vegetation in the Grand Canyon. These aerosols are expected to be significant contributors to the total atmospheric organic aerosol content. Aerosol samples from living vegetation were collected… more
Date: May 1992
Creator: Hallock, K. A.; Mazurek, M. A. & Cass, G. R.
Item Type: Refine your search to only Report
Location: None
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Aerial Gamma Ray and Magnetic Survey, Raton Basin Project, The Flagstaff Quadrangle of Arizona: Final Report, Volume 1

Description: From Operations: For the Flagstaff quadrangle, a total of 1930 line miles, excluding reflights and overlaps and missing data were flown by the Tracker and 1348 line miles were flown by the helicopter. The production summary presented below and the detailed daily production in Appendix B describes half of the total project. The Raton Basin Project, of which this quadrangle is a part, covered five other 10 x 2 quadrangles which was or will be covered in separate reports.
Date: August 1979
Creator: United States. Department of Energy. Grand Junction Office.
Item Type: Refine your search to only Report
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Preliminary Report of Reconnaissance in the Cameron Area, Arizona

Description: Introduction: A radiometric airborne reconnaissance of the Cameron, Arizona, district was conducted in the late fall of 1952 and early winter of 1953. Flying was carried out under the direction of the Salt Lake Exploration Branch of the Atomic Energy Commission, Division of Raw Materials. Airborne equipment and ground personnel were provided through the Technical Services Branch of the Grand Junction Exploration Division.
Date: June 1953
Creator: Williams, Floyd J. & Barrett, Donald C.
Item Type: Refine your search to only Report
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Examination of Copper-Uranium Occurrences in the Willaha Area, Coconino County, Arizona

Description: Abstract: A study, consisting of field and laboratory work, was undertaken in an endeavor to establish possible structural mineralization controls associated with the copper-uranium occurrences in the Willaha area, Coconino County, Arizona. Uranium mineralization, apparent at present, is localized along small fissures and vugs and in certain beds and lenses of the middle member of the Kaibab formation(Permian). It is associated with copper and iron oxide staining. Though no definite ore control… more
Date: September 1954
Creator: Puttuck, Harry E.
Item Type: Refine your search to only Report
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Analyses of Coals in the United States with Descriptions of Mine and Field Samples Collected between July 1, 1904 and June 30, 1910: Part 1. -- Analyses

Description: From Significance and value of Analyses of Coal: "The analyses published in this report cover samples of coal collected in many different parts of the country with unusual care by experiences men, in such manner as to make them representative of extensive beds of coal."
Date: 1913
Creator: Lord, N. W.
Item Type: Refine your search to only Report
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Analyses of Coals in the United States with Descriptions of Mine and Field Samples Collected between July 1, 1904 and June 30, 1910 Part 2. Descriptions of Samples

Description: From Introduction: "This volume contains the descriptions of the samples whose analyses are published in the preceding volume, Part I of this bulletin. The descriptions have been compiled from the notebooks of the persons who collected the samples, have been condensed from accounts given in published reports of the United States Geological Survey, or have furnished by the collection themselves. Inasmuch as the descriptions represent the work of many persons during a period of six years, and ina… more
Date: 1913
Creator: Lord, N. W.
Item Type: Refine your search to only Report
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