If this is the case , then the fact that NUMBER@1 km fragments of the ORGANIZATION@1 family and V-type asteroids have survived bombardment until the present indicates that the crater is only about NUMBER@2 billion years old or younger .

If this is the case , then the fact that NUMBER@1 km fragments of the ORGANIZATION@1 family have survived bombardment until the present indicates that the crater is only about NUMBER@2 billion years old or younger .
