The Grand Canyon does not exhibit the same features. I cannot rule out the possibility that it is an attack scar, due to the fact that Earth remained a life bearing planet, and erosion continued, maybe masking the tell-tale evidence of an electrical discharge, however, the evidence does not remain today. It looks as if the Grand Canyon was formed due to erosion. Plus, Valles Marineris is 10 times larger, in all physical dimensions.

Maybe.