A google search resulted in nothing but the information that they apparently did not show up on Google Maps' 2006 images.
"Wind erosion has lead to an incredible discovery through google maps.Source: http://www.exposingthetruth.co/lost-city-found-in-kalahari-desert/
Comparable to the Nasca Lines in size, and even more impressive in intricacy, a potential massive lost city or site has been revealed in an area of the “verneukpan” an inhospitable area of salt flats in southern Africa .
For over a year now, a young determined Dutchman has been using Google earth to map the world’s ancient sites, very much a crowd-sourced project, with over 900 place markers so far of sites that are known about and links to Wikipedia articles about them.
Archeomaps is the brainchild of Jaimy Visser, who posted this image yesterday on his facebook page www.facebook.com/Archeomaps after Shaun Kirwen brought it to his attention.
Jaimy had found that in his research he was finding many unexplained circular structures around the globe and started project “Esthar” to try and map these as well, in the process he has found huge areas of desert with evidence of similar ancient civilizations around the globe though none quite as striking as these which bear resemblance to carvings at Knowth, Newgrange, Malta and various other pre-historical sites.
The complex in the image is over five square miles, with less striking patterns spread over around twenty square miles at least."
Scroll down through the images and check out the area for yourself at -30.006010, 21.106024 or just click in the link below.
Link to the SKA site: