The San Rafael Swell sits dramatically in the southeastern section of Utah. Split by I-70 the Book Cliffs are to the east and the Henry Mountains to the southwest. The Swell is 80 miles long and 35 miles wide and is part of the Colorado Plateau. Over the years, many geologists, scientists and paleontologists have flocked to this area so rich in history and unique in geology – formations here range in age from 100 to 230 million years old. The Cleveland-Lloyd Dinosaur Quarry, located on the northwestern section, contains the densest concentration of Jurassic-aged dinosaur bones ever found and over 12,000 bones from at least 74 different dinosaurs have been excavated here.
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