Originally Posted by EireEngineer
While it may have been hotly debated in the past that craters on the moon are volcanic, it hasnt been in quite sometime. Since you can clearly see the ejecta fans around them it is fairly clear that they are impact craters. Not to mention the lack of evidence for any substantial vulcanism at any time in the moons history. In addition, whether or not a meteorite "explodes" on impact or simply dives its way into the ground has far more to do with its composition then with its kinetic energy at impact.
I think you might benefit from a kinematics course at your local community college.
There are several different explanations for the ejecta fans on the Moon. My favourite is as follows. The Moon's crust has just solidified and is still thin but as the rest of the Moon solidifies and shrinks as a result, pockets of gas are forced towards the surface causing the solidified surface to bulge into domes. These domes then crack under the pressure causing a sudden release of gas followed by a complete collapse of the dome. The result of this collapse is ejecta fans.
Such unexplained domes, though far smaller in size can be seen on the Moon to this day.
If you believe I have my kinematics wrong then please inform me where my logic is faulty.