Giant's Causeway cases the horizontal fracture has resulted in a bottom face that is convex while the upper face of the lower segment is concave, producing what are called "ball and socket" joints. The size of the columns is primarily determined by the speed at which lava from a volcanic eruption cools. The extensive fracture network produced the distinctive columns seen today. The basalts were originally part of a great volcanic plateau called the Thulean Plateau which formed during the Paleocene. According to legend, the columns are the remains of a causeway built by a giant. The story goes that the Irish
Cave Temples of Mahabalipuram caves is that of the goddess Durga (a form of goddess Shakti) who killed Mahishasura the buffalo-headed demon which has a natural beauty with elegance of sense of movement, and this bas-relief panel in the Mahsisuramardhini Cave Temple is considered a masterpiece of Indian art. Many of the caves of the Pallava period have remained incomplete. The procedure in creating these caves involved creation of a smooth rock face, then cutting columns through the polished rock faces of required size and then carving bas-reliefs on the walls of the cave. Some of the cave temples are covered by the UNESCO