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
Secret of the Cave events and deeds begin to occur and rumors of ghosts sweep the village. All these things are pointing to something mysterious that is going on in a nearby cave. Roy sets out to disprove the rumor and decides to explore the cave with his new, teenage local friends Oscar (Gareth O'Connor) and Abbey (Niamh Finn). Roy faces his fears and discovers the secret of the cave. The film is based on the 1920 children's book of the same name by Arthur S. Maxwell (also known as "Uncle Arthur"). The book has sold more than 142,000 copies worldwide in English, Spanish,