Geology of Ireland 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 coast of Ulster. Outcrops
Cave of El Soplao varied columns. As in the Galería of the Cauliflower can be seen traces of an earthquake. Located to the east. It is one of the highest, reaching 30 metres high. Its length exceeds 160 metres. Notable cast sheets, giant stalagmites pisolithic nests. Its name comes from the number of colours displayed on it, because of the variety of salts dissolved in water. This is the list of minerals and fossils found in the cave, in alphabetical order: Cantabrian Speleogical Club "The Cave of El Soplao, an unique cave" (1987) Cave of El Soplao El Soplao (Cantabrian: El Soplau) is a