This is an issue (in title) which is not handled here. I just found this short comment;
viewtopic.php?f=4&t=363#p4271
These lines are obviously "Man made". Short introduction;
https://en.wikipedia.org/wiki/Nazca_Lines
The Palpa lines can be easily been though as an ancient airport; Behind this link there is a lot of interesting pictures.
http://www.am-sur.com/am-sur/peru/Nasca/Lineas-mapas-ENGL.html
Then I want to combine these lines with the question; "Where is the optimal place to launch a space-shuttle?"
It's in equator. But it's not only equator. It's possibly high place in equator. The Reason is that Earth's rotation can be used to reach escape velocity. The tangential velocity goes up with radius, so it's equator in possibly high mountain.
I expect nascalines are scars from radioluminescence, like "Tritium illumination";
https://en.wikipedia.org/wiki/Tritium_illumination
The scars would be caused by the radioactivity of such matter.
And I even found this place, which might have been this "Space-launch" place;
https://en.wikipedia.org/wiki/Marcahuasi
pls. look it in google maps so that you see the height. It's very flat area in mountains, 3 km long in North-South direction. This is of course wrong if we look the equator as it's today. But the rotation of Uranus shows us what is possible. And There is even dreams-theories about how the past of the Earth might have been;
http://www.worlddreambank.org/J/JAREDIA.HTM
Funnily enough the Equator of this "Jaredia" is exactly at the "Marcahuasi"
There is also another aspect. The "Northpole" is in this case in Africa. And funnily enough, there is no Dolmens in Africa.
Disclaimer; These are just thoughts based on observation, and I don't try to claim anything. Our thoughts just doesn't change the reality. The observed Reality should change our thoughts. Just feel free to have your own thoughts and share them here. The topic is Nazca & Palpa lines.