Late Heavy Bombardment

The Late Heavy Bombardment (abbreviated LHB and also known as the lunar cataclysm) is a hypothetical event thought to have occurred approximately 4.1 to 3.8 billion years ago (Ga), spanning the Neohadean and Eoarchean eras. During this interval, a disproportionately large number of asteroids apparently collided with the early terrestrial planets i...
Found on http://en.wikipedia.org/wiki/Late_Heavy_Bombardment

late heavy bombardment

(from the article `meteor and meteoroid`) ...formation was winding down, the asteroid-size planetesimals that were left over were being swept up by the new planets. The intensity of the ...
Found on http://www.britannica.com/eb/a-z/l/19

late heavy bombardment

The period between about 4.0 and 3.8 billion years ago when the Moon and other objects in the Solar System were pounded most heavily by wayward asteroids. The evidence of this pummeling is clear to see in the maria basins on the Moon and in similar structures elsewhere, such as the Caloris Basin on ...
Found on http://www.daviddarling.info/encyclopedia/L/late_heavy_bombardment.html
No exact match found