i have sean similare pattern in a stone before, it was formed by gravel pushed by Ice during the ice age.
if you see closly at the picture you will see that dust and sand are lying in straight "lines" from the crater, that is from the inpact. mayby (tho unlikly) the "wood" is part of what ever made the crater?.
and do any one know what the shiny object is? its directly obove the "log"