Thanks Renfield.
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http://www.academia.edu/3013513/IMPACT_-BOLIDES_CRATERS_AND_CATASTROPHES
IMPACT!BOLIDES, CRATERS, AND CATASTROPHES
by Fred Jourdan
Abstract It is now universally accepted that the impact of planetesimals, asteroids, and comets has been a fundamental process throughout the Solar System. Catastrophic impact events have been instrumental in developing the early history... more
Journal Name: Elements
Publication Date: Feb 1, 2012
http://171.66.125.216/content/8/1/19.full