I suspect a crystallographic analysis of the megalithic stone would reveal more.
Considered to be granite and andesite, other questions emerge.
These Megalithic (mega-”large”, “lith”-stone) are by their names large stones without mortar or cement. Similar to monoliths or dolmens, are found through the world associated with ancient construction say more than 9000yrs ago. Pre-Noah, before the flood.
When looking at some from Gobekli Tepe, one might wonder if these were so sophisticated in their formation, and so intricate in their fitting, then why the crude sketchings of animal figures on them or faces.
Above is from Gobekli Tepe in Turkey, example of a megalith.
If an advanced stone-cutting, then why the coarse artwork in precision fit stone?
It's like asking, why would an advanced civilization, centuries to millennia more sophisticated than ourselves, journey here in UFOs, only to mutilate cattle and probe humans?