Spacecraft Clementine produced these pictures of the moon. I notice there are far more craters on the poles then there were on the equators.
There are craters on top of craters. This model asserts these are polar lightning from the sun. Almost all of these craters are approximately circular in nature. This would not be the case with solid rock hitting the moon. There are interesting craters that have higher reflective ejecta patterns. But these are few.
These are high energy lightning strikes. From the sun.