The geology of Ireland is characterized by a diverse range of rock types and formations. The country primarily consists of ancient igneous, metamorphic, and sedimentary rocks, with the oldest rocks dating back over 1 billion years. The landscape features notable geological formations, including the Burren limestone region and the Giant's Causeway, which is famous for its unique basalt columns. Glacial activity during the last Ice Age significantly shaped Ireland's topography, creating valleys, lakes, and coastal features. The Irish Sea and surrounding areas also reveal evidence of tectonic activity, with the Dublin and Belfast basins showcasing sedimentary deposits. Overall, Ireland's geology reflects a complex history of formation and transformation.