Old Harry Rocks

The Cretaceous chalk (see https://www.facebook.com/photo.php?fbid=491861070874942&set=a.352867368107647.80532.352857924775258&type=1) sits atop the rocks of the latest Jurassic at this iconic set of sea stack carved out by the action of waves pinching off the harder better cemented portions of rock at the Eastern end of the Jurassic Coast in the south of England on the Isle of Purbeck in Dorset. During the Mesozoic, sea levels were very high because the ocean basins were newly formed as Pangaea split apart into the modern continents. Young ocean basins are hot from the roiling heat below and hence more buoyant, so as they rose they literally pushed the sea onto large areas that are now land.

Keep reading


Giovanni Battista Piranesi’s series of prints called “Imaginary Prisons” are fantastical studies of great underground architecture, confusing labyrinths of staircases and arches, which at first glance appear realistic, but the more you study them, the more impossible they become.

The Round Tower,” c. 1749

Prisoners on a Projecting Platform,” c. 1749

The Gothic Arch,” c. 1749

The Drawbridge,” c. 1749

The Pier with Chains,” c. 1749