H. Jay Melosh
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Dr. H. Jay Melosh (born June 23, 1947) is an American geophysicist, renowned as an expert on impact cratering. He earned a degree in physics from Princeton University and a doctoral degree in physics and geology from Caltech in 1972. Dr. Melosh's research interests include impact craters, planetary tectonics, and the physics of earthquakes and landslides. His recent research includes studies of the giant impact origin of the moon, the Chicxulub impact that extinguished the dinosaurs and the ejection of rocks from their parent bodies. He is also active in astrobiological studies that relate chiefly to the exchange of microorganisms between the terrestrial planets (a process known as panspermia, or in his terms transpermia ). In 1989, Oxford University Press published his book "Impact Cratering: A Geologic Process" (ISBN 0-19-510463-3)
Dr. Melosh is a member of the American Geophysical Union, Geological Society of America, Meteoritical Society, American Astronomical Society (Division of Planetary Sciences) and the American Association for the Advancement of Science. He is the recipient of the Barringer Medal of the Meteoritical Society for his work on the physics of impact and the G. K. Gilbert Award of the Geological Society of America. He was elected to the National Academy of Sciences in 2003.
Asteroid 8216 Melosh is named in his honour.