• 2003 Leonard Medal for Herbert Palme

      Wasson, John T. (The Meteoritical Society, 2003-01-01)
    • 2003 Nier Prize Citation for Steven J. Desch

      Fegley, Bruce (The Meteoritical Society, 2003-01-01)
    • Abstracts

      The Meteoritical Society, 2003-01-01
    • Barringer Medal Citation for Graham Ryder

      Spudis, Paul D. (The Meteoritical Society, 2003-01-01)
    • Estimating a new date for the Wabar meteorite impact

      Basurah, H. M. (The Meteoritical Society, 2003-01-01)
      The Wabar meteorite craters were discovered in the desert of Al-Rub Al-Khali, Saudi Arabia by Philby (1933) who was the first to identify them as created in a meteorite impact. The age of these craters is still a subject of debate. The first approximate date was 1863, based on a reported meteorite fall at an unidentified site in the Al-Rub Al Khali. Recently conducted luminescence dating suggests an age of 289 +/- 46 years (Prescott et al. 2002). It is the aim of this article to present evidence contained in historical poems, which substantiates this dating. The texts quoted indicate that nearly 300 years ago, i.e., in 1704, a great fireball in the skies was seen from Tarim, Yemen, southwest of the Wabar site. This dating seems roughly to coincide with the results of recent scientific investigations.
    • Mineralogy, petrology, and thermal evolution of the Benton LL6 chondrite

      Walton, E. L.; Spray, J. G. (The Meteoritical Society, 2003-01-01)
      The Benton LL6 chondrite is a brecciated meteorite that was observed to fall on January 16, 1949 in Benton, New Brunswick, Canada. Internally, the meteorite comprises light-colored, subangular to subrounded clasts embedded in a dark grey-colored matrix. Clasts comprise the same mineral phases as the matrix, as well as chondrules and larger (50-100 micrometers) single mineral grains (mainly olivine and orthopyroxene). Composite (polyphase) clasts can be serveral millimeters in length. Numerous examples of post-brecciation and post-annealing sheraring and displacement at the micron to millimeter scale occur in the form of shock veins. Benton is a shock stage S3 chondrite, which experienced shock pressures on the order of 15-20 GPa, with an estimated post-shock temperature increase of 100-150 degrees C. Benton's history comprises a sequence of events as follows: 1) chondrule formation and initial assembly; 2) brecciation; 3) thermal metemorphism; and 4) shock veining. Events (2) and (4) can be equated with distinct impact events, the former representing bombardment of target material that remained in situ or collisionally fragmented during metamorphism, and then gravitationally reassembled, the latter probably with release from the source body to yield a meteorite. Thermal metamorphism post-dates brecciation. The mean equilibration temperature recorded in the Benton LL6 chondrite is 890 degrees C, obtained using the two pyroxene geothermometer.
    • Oral histories in meteorites and planetary science: X. Ralph B. Baldwin

      Marvin, U. B. (The Meteoritical Society, 2003-01-01)
      In this interview, Ralph Baldwin describes how he earned his Ph.D. in astronomy and then, early in his career, became interested in the Moon and the origin of its craters. When he concluded that the craters were formed by meteorite impacts rather than by volcanism, he faced great difficulties in finding an audience or a publisher. During World War II, he helped to design and develop operating specifications for the radio proximity fuze which has been credited with shortening the War by at least one year. Subsequently, he joined the family firm, The Oliver Machinery Company, in Grand Rapids, Michigan. He pursued his lunar studies on nights and weekends and wrote his first book, The Face of the Moon, which was published in 1949. Sales were poor, but the book was read by Harold degrees C. Urey, who sought out Baldwin for discussions about the Moon, and by Peter M. Millman, in Ottawa, who prompted Dr. Carlyle S. Beals, the Dominion Astronomer, to begin the highly successful search for impact craters on the Canadian Shield. With his second book, The Measure of the Moon, published in 1963, Baldwin became recognized as a leading authority on the Moon and on planetary processes in general. He is the only scientist other than Eugene M. Shoemaker to whom the Meteoritical Society has presented both its Leonard Medal, in 1986, and its Barringer Medal, in 2000, and who also received the G. K. Gilbert Award, in 1986, from the Planetary Sciences Division of the Geologial Society of America.
    • Oral histories in meteorites and planetary science: XI. Masatake Honda

      Marvin, U. B. (The Meteoritical Society, 2003-01-01)
      Masatake Honda majored in inorganic chemistry at the University of Tokyo and then pursued graduate studies in geochemistry. In 1943, he completed his first research project, which yielded new data on the behavior of strontium in carbonates. He then spent the next two years as a technical officer in the Japanese Imperial Navy. While on duty, he gained expertise in the important new field of ion exchange methods, which he ultimately chose as the topic for his Ph.D. thesis and then expanded into a book. In 1955, Honda traveled to Switzerland and spent a year in research laboratories at Bern and Zrich. He then joined Professor James R. Arnold at Princeton University and soon began focusing his research on cosmic-ray produced nuclides in meteorites. Two years later, he accompanied Dr. Arnold to the University of California at La Jolla where they joined the research group of Professor Harold degrees C. Urey. Honda developed techniques for measuring terrestrial ages of meteorites and showed that most of them have survived weathering for vastly longer periods than had been anticipated. After spending nearly eight years abroad, he returned to Japan in 1962 as a full professor at the University of Tokyo. During the Apollo missions, he performed research on cosmogenic nuclides in lunar rocks, surface soils, and deep drill cores. In the same period, he studied terrestrial histories of numerous Antarctic meteorites. In 1992, he retired from his professorship but he continues to carry on his research and to publish papers. In 1987, the Meteoritical Society presented its Leonard Medal to Masatake Honda for his pioneering work in establishing the abundances and production rates of stable, long-lived, and short-lived nuclides by cosmic irradiation of meteorites and lunar samples.
    • The Meteoritical Bulletin, No. 87, 2003 July

      Russell, Sara S.; Zipfel, Jutta; Folco, Luigi; Jones, Rhian; Grady, Monica M.; McCoy, Timothy; Grossman, Jeffrey N. (The Meteoritical Society, 2003-01-01)
      Meteoritical Bulletin No. 87 lists information for 1898 newly classified meteorites, comprising 1048 from Antarctica, 462 from Africa, 356 from Asia (355 of which are from Oman), 18 from North America, 5 from South America, 5 from Europe, and 3 from Australia. Information is provided for 10 falls (Beni M’hira, Elbert, Gasseltepaoua, Hiroshima, Kilabo, Neuschwanstein, Park Forest, Pê, Pétèlkolé, and Thuathe). Two of these--Kilabo and Thuathe--fell on the same day. Orbital characteristics could be calculated for Neuschwanstein. Noteworthy specimens include 8 Martian meteorites (5 from Sahara, 2 from Oman and 1 from Antarctica), 13 lunar meteorites (all except one from Oman), 3 irons, 3 pallasites, and many carbonaceous chondrites and achondrites.