Melting stone is another order of nuclear fission, though , beyond sand turned to obsidian glass. Rather than a flash its would be a prolonged focused nuclear generated heat?
Another photo angle, the puddling is narrower at the top and wider at the bottom, as if there was a ray of energy involved:
"Another mystery of the Dendera temple is the melted stairs. They lead up to the temple roof. These stone steps appear to be melted. And it is hard to imagine what could have melted solid stone steps at the time of the building."
Interesting to do some forensic geometry to see the direction in which the angle of attack leads,The vault of the sky or nearer the horizon?
