/http%3A%2F%2Fplatform.ak.fbcdn.net%2Fwww%2Fapp_full_proxy.php%3Fapp%3D9953271133%26v%3D1%26size%3Dz%26cksum%3Db682e694e8893e310b989f95a8b6c8d2%26src%3Dhttp%3A%2F%2F1.bp.blogspot.com%2F-V_A8AZmdyMs%2FUCp0pPiog7I%2FAAAAAAAAJJY%2Fr_fY2c8kCe0%2Fs320%2FPetroglyphs%2B2%2B.jpg)
The Ancient Art of Petroglyphs
There is no particular rhyme or reason to the location of petroglyphs, they mostly take advantage of the type of rock surface. In the desert, some rocks very slowly become coated with manganese oxide, the black coating you can see on the rocks. Small traces of manganese are dissolved in rain
Go to top