USRA Houston Repository: Recent submissions

  • Morgan, J.; Gulick, S.; Mellett, C. L.; Green, S. L.; Kring, D. A. (International Ocean Discovery Program, 2017-12-30)
    Asteroid and comet impacts are known to cause severe disruption to surface biota, as is the case for Chicxulub, but what is their effect on the present and ancient deep biosphere, where a large proportion of the Earth’s ...
  • Gulick, Sean P. S.; Bralower, Timothy J.; Ormö , Jens; Hall , Brendon; Grice, Kliti; Kring, D. A. (National Academy of Sciences, 2019-09-24)
    Highly expanded Cretaceous–Paleogene (K-Pg) boundary section from the Chicxulub peak ring, recovered by International Ocean Discovery Program (IODP)–International Continental Scientific Drilling Program (ICDP) Expedition ...
  • Collins, G. S.; Patel, N.; Davison, T. M.; Rae, A. S. P.; Morgan, J. V.; Gulick, S. P. S.; Kring, D. A. (Nature, 2020-05-26)
    The environmental severity of large impacts on Earth is influenced by their impact trajectory. Impact direction and angle to the target plane affect the volume and depth of origin of vaporized target, as well as the ...
  • Unknown author (Lunar and Planetary Institute, 2016)
    Training for informal educators.
  • Unknown author (National Aeronautics and Space Administration, Office of Space Science, Solar System Exploration Division, Office of Human Resources and Education, Education Division, 1997)
    The study of meteorites provides a unifying theme that links almost every aspect of Earth and planetary science with mathematics, physics, chemistry and even biology. The activities are divided into units based on key ...
  • Hunt, Leslie; Karl, Rita (Association for the Advancement of Computing in Education, 2000)
    This paper provides an account of the instructional design and development process used by a team of students enrolled in a graduate level course in Distance Education as the team members conceptualized and created two ...
  • Pai, S. I.; Menon, S.; Schultz, P. H. (Pergamon Press, 1979)
    The possible effects of lift on individual ejecta trajectories after an impact event are examined, considering a dimensionless transport parameter (K), the initial velocity vector of the particles, and the ratio of the ...
  • Thomsen, Jeffrey M.; Austin, Michael G.; Ruhl, Stephen F.; Schultz, Peter H.; Orphal, Dennis L. (Pergamon Press, 1979)
    Early time two-dimensional finite difference calculations of laboratory-scale hypervelocity (6 km/sec) impact of 0.3 g spherical 2024 aluminum projectiles into homogeneous plasticene clay targets were performed and the ...
  • Beaty, Dave; Ehlmann, Bethany; McCleese, Daniel; Meyer, Michael; Zurek, Richard (Lunar and Planetary Institute, 2014)
    The Eighth International Mars Conference will be an ideal time to step back and summarize our current understanding of Mars, consolidate our primary paradigms for martian processes and history, and refocus the primary ...
  • Srnka, L. J.; Mendenhall, M. H. (Pergamon Press, 1979)
    The hypothesis that a dynamo once existed in the moon, and hence was the source of lunar paleomagnetism, is tested using a model for the global thermoremanent magnetization of spherical lithospheres. Various models of an ...
  • Conca, James; Hubbard, Norman (Pergamon Press, 1979)
    The major geologic units in and around the Smythii basin are reflected in the Al2O3 and MgO values obtained using improved orbital X-ray fluorescence data from Apollo 15. One of these units is a high albedo plains-forming ...
  • Pelizzari , Michael A.; Criswell, David R. (Pergamon Press, 1978)
    The motion of dust grains from a photoelectrically charged object at the moon's sunset terminator is studied with the aid of a simple model. It is shown that sunlit objects ranging in size from less than 0.01 cm to 5 cm ...
  • Schultz, Peter H.; Mendell, Wendell (Pergamon Press, 1978)
    The Apollo 17 Scanning Infrared Radiometer experiment showed that the ejecta deposits of large lunar craters (D greater than 3 km) typically exhibit uniform nighttime temperatures comparable to or less than those of the ...
  • Orphal, Dennis L.; Schultz, Peter H. (Pergamon Press, 1978)
    The 210 m.y. old Manicouagan impact structure of eastern Quebec has been previously interpreted as an analog of large (400 km diameter) multi-ringed basins on the Moon. However, existing geologic evidence also supports an ...
  • Simonds, Charles H.; Phinney, William C.; McGee, Patricia E.; Cochran, Ann (Pergamon Press, 1978)
    Impactites lining the base of the crater at West Clearwater Lake consist of a 0 to 20 m thickness of fragmental breccia overlain by about 18 m of clast-rich melt rock which in turn is overlain by at least 85 m of clast-poor ...
  • Simonds, Charles H.; Phinney, William C.; McGee, Patricia E.; Cochran, Ann (Pergamon Press, 1978)
    A field study at the 30 km diameter West Clearwater impact crater was carried out during the summer of 1977 to identify the nature of the flow of impact melt and less shocked debris during the excavation stage of the ...
  • Zinner, E.; Dust, S.; Chaumont, J.; Dran, J. C. (Pergamon Press, 1978)
    Surface enhancements of Mg, Ti and Fe were measured with an ARL-IMMA and a CAMECA IMS-300 ion microprobe in 100-200 mesh plagioclase grains from eight different lunar soils. Enhancements of Mg, Ti and Fe were found in ...
  • Walker, D.; Powell, M. A.; Lofgren, G. E.; Hays, J. F. (Pergamon Press, 1978)
    Crystallization textures produced experimentally from eucrite Stannern show variations as a function of initial melting temperature (T 0) and linear cooling rate.
  • Floran, R. J.; Caulfield, J. B. D.; Harlow, G. E.; Prinz, M. (Pergamon Press, 1978)
    The Simondium, Pinnaroo, and Hainholz mesosiderites are interpreted to be clast-laden impact melts that crystallized from immiscible silicate, metallic (Fe-FeS) liquids.
  • Floran, R. J. (Pergamon Press, 1978)
    The classification of mesosiderites proposed by Powell (1971) is modified and expanded to include impact melts. A petrographic study of all 20 mesosiderites reveals that most contain a complex assemblage of mineral, lithic, ...

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