Re: Devonian?
"angle, velocity, etc and what did it hit"
There's only a limited range of velocities for most asteroids (vs comets) hitting a planet: 1x to 2x the planet's escape velocity. An asteroid approaching a planet from "astern" will probably have a low initial velocity relative to the planet and be accelerated to the planet's escape velocity by the time it hits. Crossing and head-on impacts add the asteroids' higher relative initial velocity to the planet's escape velocity, but such asteroids - given the range of asteroid velocities in the Solar system - aren't going to be much higher than Earth's escape velocity.
Comets have a wider range of velocities because they pick up quite a head of steam as the drop into the inner system.
Biting the hand that feeds IT
