American Basaltworks is committed to bring you high quality domestically quarried and manufactured basalt from the Pacific Northwest. The dramatic forms of the columnar basalt are from a 16 million year old, rapidly cooled extrusive igneous rock called the Columbia River Basalt flow. This is a dense fine grained stone with a bronze patina on the outside and clean black interior. This unique material is linked to the volcanically active Cascade mountain range and a part of the "Ring of Fire". Beautiful, strong, and versitle... we know you find the Cascadia Basalts a wonderful addition to your architectural vision.