Old Red Sandstone

The Old Red Sandstone is a geological formation consisting of reddish-colored sandstone rocks formed around 400 million years ago during the Silurian and early Devonian periods. It primarily results from river, lake, and delta sediments deposited in ancient landscapes now located in parts of the UK and Scandinavia. The distinctive red color comes from iron oxide (rust) within the rocks. These formations are important for understanding Earth's early terrestrial environments, and they often contain fossils of early land plants and primitive animals, providing valuable insights into prehistoric life and geological history.