An asteroid breakup 160 Myr ago as the probable source of the K/T impactor

  title={An asteroid breakup 160 Myr ago as the probable source of the K/T impactor},
  author={W. Bottke and D. Vokrouhlicky and D. Nesvorn{\'y}},
  • W. Bottke, D. Vokrouhlicky, D. Nesvorný
  • Published 2007
  • Geology, Medicine
  • Nature
  • The terrestrial and lunar cratering rate is often assumed to have been nearly constant over the past 3 Gyr. Different lines of evidence, however, suggest that the impact flux from kilometre-sized bodies increased by at least a factor of two over the long-term average during the past ∼100 Myr. Here we argue that this apparent surge was triggered by the catastrophic disruption of the parent body of the asteroid Baptistina, which we infer was a ∼170-km-diameter body (carbonaceous-chondrite-like… CONTINUE READING
    130 Citations

    Figures and Topics from this paper

    Fragments of Late Eocene Earth-impacting asteroids linked to disturbance of asteroid belt
    • 20
    • PDF
    Dynamical erosion of the asteroid belt and implications for large impacts in the inner Solar System
    • 126
    • Highly Influenced
    • PDF
    Planetary Trojans - the main source of short period comets?
    • 23
    • PDF
    Dynamical History of the Asteroid Belt and Implications for Terrestrial Planet Bombardment
    • 1
    • PDF
    Is the Eureka cluster a collisional family of Mars Trojan asteroids
    • 2
    • Highly Influenced
    • PDF


    A meteorite from the Cretaceous/Tertiary boundary
    • 141
    Linking the collisional history of the main asteroid belt to its dynamical excitation and depletion
    • 357
    • PDF
    Comet or Asteroid Shower in the Late Eocene?
    • 38
    • PDF