Other
Scientific paper
Jan 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003icbg.conf...14c&link_type=abstract
Impact Cratering: Bridging the Gap Between Modeling and Observations, February 7-9, 2003. LPI Contribution No. 1155. Houston,
Other
Craters, Impact Velocity, Energy Of Formation, Targets, Argentina, Excavation, Explosions, Iron Meteorites, Projectiles, Redundancy
Scientific paper
The Campo del Cielo crater field in northern Argentina was formed about 4000 years ago by a shower of iron meteorites. The crater field contains at least twenty small impact craters, so there is a degree of redundancy here that is not often enjoyed in field work on impact craters. The target material is a very uniform, unconsolidated loess, and we could think of this as the same impact experiment repeated twenty times into the same target by projectiles of different mass, at nearly the same impact velocities, and over some range of impact angles. At least one, and possibly several of the larger craters are explosion-type features. The others were formed by shock-wave excavation and still contain the crater-causing masses within them. Most of the craters are small enough so that their original dimensions can be determined by trenching. The dimensions of each crater can be used to estimate the impact angle of the projectile and the energy of formation of the crater. When the mass of the crater-forming projectile has been determined, its velocity of impact can be calculated.
Cassidy William A.
Wright Shawn P.
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