Impact cratering is the most common geological process in the universe, but as recently as 1960 there was only one recognized impact crater [Barringer Crater in Arizona] on the earth, and even that obvious one was hotly debated. Today over one hundred and fifty are recognized, but many of them are still debated. The earth with it's gerater gravity and surface area certainly took far more hits than the moon did. The Shoemaker/Levy Jupiter show a few years ago proved that all the big ones are not over with.
Crater remains are all around us. We just need to learn how to recognise them after they have been modified by other earth forces. Just how mature is a science that cannot distinguish between an impact crater and a salt dome?
Something has pressed the middle part down in a cone shape, blew a quarter of the hill away, and filled the area in front of this face with iron/silicate spheres filled with sand, and strange dikes and sills with the far sides radiating iron silicate tunnels or pipes.