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
Gellért Hill Cave the chapel reopened on 27 August 1989 with the destruction of the thick concrete wall that had sealed the cave. By 1992, the Chapel had been restored and the Pauline Order had returned to the cave. Today, the monks continue to perform religious functions within, though the cave is also a common tourist attraction. The church is complemented by a mysterious monastery carved into the rock and decorated with striking neo-gothic turrets. The walls of the cave are formed of all-natural living rock. The church features many rooms, worthy of attention is the one in which all the ornaments have