Geology of Ireland longest known free-hanging stalactites. Geology of Ireland The geology of Ireland consists of the study of the rock formations in Ireland. The island contains rocks from every age from Proterozoic to Holocene and a large variety of different rock types is represented. The basalt columns of the Giant's Causeway together with geologically significant sections of the adjacent coast have been declared a World Heritage Site. The geological detail follows the major events in Ireland's past based on the geological timescale. The oldest known Irish rock is about 1.7 billion years old and is found on Inishtrahull Island off the north
Cave of the Winds (New York) Cave of the Winds (New York) The Cave of the Winds was a natural cave behind Bridal Veil Falls at the Niagara Falls. The cave was some high, wide and in depth. It was discovered in 1834, and originally dubbed Aeolus' Cave, after the Greek god of winds. Guided tours began officially in 1841, through Goat Island and descending down a staircase closer to the falls, into the cave. A rock fall closed the tour in 1920. It officially reopened in 1924, bringing visitors to the front of the Bridal Veil instead of behind it, on a series of decks