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Impact cratering on porous asteroids
Icarus, 2003Abstract The increasing evidence that many or even most asteroids are rubble piles underscores the need to understand how porous structures respond to impact. Experiments are reported in which craters are formed in porous, crushable, silicate materials by impacts at 2 km/s. Target porosity ranged from 34 to 96%.
Kevin R. Housen, Keith A. Holsapple
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1982
Impact cratering by high-velocity projectiles is an important process in the evolution of planets. Observations on planets and satellites with solid surfaces show that small impact craters are bowl-shaped and deep. Larger impact structures are shallow, they have overall flat interiors with several characteristic morphological elements, such as central ...
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Impact cratering by high-velocity projectiles is an important process in the evolution of planets. Observations on planets and satellites with solid surfaces show that small impact craters are bowl-shaped and deep. Larger impact structures are shallow, they have overall flat interiors with several characteristic morphological elements, such as central ...
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Impact Cratering and Post-impact Sedimentation
2010The impact origin of the Mjolnir structure has been confirmed by detailed studies of lithologies from two shallow boreholes; one close to the crater center (7329/03-U-01) and one 30 km NE from the crater periphery (7430/10-U-01) (Fig. 1.7). The boreholes revealed brecciated sediments containing shocked quartz grains.
Henning Dypvik +5 more
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Impact Crater Formation in Rock
Journal of Applied Physics, 1960Craters were produced by firing spherical steel projectiles of 316- and 932−in. diam into sandstone and granite at velocities ranging from 300 to 6000 ft/sec. Impact angles of 30, 60, and 90 deg were used for the sandstone and 90 deg for the granite. The craters are formed by two mechanisms: (a) crushing of material in front of the projectile and (b ...
William C. Maurer, John S. Rinehart
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Nature, 2005
Aerial surveys of the Vredefort impact crater in South Africa suggest that it is only weakly magnetic. The rocks themselves tell a different story, but does this apply to giant impact basins on Mars?
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Aerial surveys of the Vredefort impact crater in South Africa suggest that it is only weakly magnetic. The rocks themselves tell a different story, but does this apply to giant impact basins on Mars?
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Craters produced by missile impacts
Journal of Geophysical Research, 1971Craters produced by, missiles with oblique trajectories and kinetic energies between 2.1×1014 and 81×1014 ergs produce craters 2 to 10 meters across. The craters and their ejecta are typically bilaterally symmetrical about the plane of the trajectory. Crater dimensions are strongly dependent on target material and kinetic energy of the missile. Craters
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The effect of viscosity in hypervelocity impact cratering
4th Aerodynamic Testing Conference, 1969Numerical method for time dependent compressible Navier-Stokes equations applied to axisymmetric flow field produced by hypervelocity impact, examining viscous ...
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Potassium‐rich sandstones within the Gale impact crater, Mars: The APXS perspective
, 2016L. Thompson +10 more
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