Hello, was not quite sure where to put this but I came upon a website with a collection of Marutuanian rock art https://africanrockart.org/rock-art-gallery/mauritania/
If you follow that link you will find Paintings of
Concentric circles sometimes with alternating white and red patterns
A depiction of what seems unmistskenly, a dinosaur
A depiction of a man wearing a horned helmet subjugating another man
Other various geometric shapes and anomalies
And I really think that this could be a good addition to the evidence that points to the structure being more than just geological anomaly, as well as a connection that the "sea peoples" were present in the area (horned helmets in 2000 bc or earlier) anyway just discovered this project and wish it well.