Sunday, 6 March 2016

Richat Structure

Taken from a post with stunning shots by astronaut Scott Kelly. In his own words: "Photo located on the western edge of the Sahara desert at centre Mauritania in north-west Africa. There is a giant quartzite circle called Richat Structure. It is approximately 24 miles across. This volcanic bulge that never erupted and was levelled by erosion makes for interesting Earth art." First seen here.