Fossil sites in Utah

U-Dig Fossils in Millard County works the Wheeler Shale, a Middle Cambrian deposit approximately 507 million years old. Visitors quarry limestone blocks and split them to find trilobites, with Elrathia kingi as the most common species. Complete specimens are yours to keep. The site operates on a fee basis and is open spring through fall, weather permitting. The surrounding desert is remote; the nearest services are in Delta, roughly 50 kilometers away.

Cleveland-Lloyd Dinosaur Quarry in Emery County is managed by the Bureau of Land Management and is free to visit. The quarry has produced more than 12,000 Jurassic dinosaur bones, primarily Allosaurus, from a single densely packed bone bed. A visitor walkway allows you to look directly down into the quarry at articulated and disarticulated elements still embedded in the matrix. Collecting is prohibited, but the scale and density of material visible from the walkway are unlike any other site in the western US.