St. Peter Sandstone

St. Peter Sandstone is a geological formation primarily found in the Midwest United States, dating back to the Early Ordovician period, around 485 to 470 million years ago. It consists mainly of fine, well-sorted quartz sand, which gives it a light-colored, sometimes almost white appearance. This sandstone is significant for its excellent permeability, making it a promising resource for groundwater and oil reservoirs. It also has historical value in construction and landscaping, where it's used for buildings and monuments due to its durability. Its unique features provide insights into Earth’s ancient environments and geological processes.