This page represents evidence from one location where are found numerous examples of electrical scarring, that correlates directly with what is seen in full scale on planetary surfaces. One of the surfaces revealed here provides a close match to the floor of Zunil crater on Mars and on Vesta. These features are also seen in microscopic images of surfaces machined electrically through the usage of an industrial EDM process, as revealed by Wal Thornhill
the next images are just thumb nails from the directory.
Image of surface found at this PDF.
Pay special attention to the image of steep features like what is found at many locations around our world.
Super close-up non-stereo view Image credit: NASA, JPL, MOC and all.