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Dr David Kring Geologist signed autographed postcard Asteroid Extinction Event

Dr David Kring Geologist signed autographed postcard Asteroid Extinction Event

$ 7.1

Availability: 100 in stock
  • Item must be returned within: 14 Days
  • All returns accepted: Returns Accepted
  • Restocking Fee: No
  • Refund will be given as: Money Back
  • Return shipping will be paid by: Buyer

    Description

    4 x 6 postcard--ships in rigid toploader
    Studies confirming Yucatan Asteroid impact wiped out over half earths plants and animals.
    David Kring received his Ph.D. in earth and planetary sciences from Harvard University. He specializes in impact cratering processes produced when asteroids and comets collide with planetary surfaces. He has worked extensively at Meteor Crater, which is one of the world’s most spectacular NEA impact sites. Kring is perhaps best known, however, for his work with the discovery of the Chicxulub impact crater, which he linked to the K-T boundary mass extinction of dinosaurs and over half of the plants and animals that existed on Earth 65 million years ago. He has also studied the environmental effects of impact cratering and shown how impact processes can affect both the geological and biological evolution of a planet. Dr. Kring has led a decade-long campaign to test the lunar cataclysm hypothesis, which is one of the great intellectual legacies of the Apollo program. Kring has suggested that the impact bombardment created vast subsurface hydrothermal systems that were crucibles for pre-biotic chemistry and provided habitats for the early evolution of life. He calls this concept the impact-origin of life hypothesis.
    You are bidding on an authentic hand signed item(s) by the person(s) named in the auction title. We do not sell pre-prints, reprints or copied autographs of any sort.
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