Utah’s prehistoric scene

The cast of a prosaurolophus, a duck-billed dinosaur able to swim as well as walk on land, is on display at the College of Eastern Utah Prehistoric Museum in Price. Experts believe this dinosaur was active in eastern Utah during the Cretaceous period although a complete skeleton has yet to be found in the area.  (Gina Ferazzi / Los Angeles Times)

An allosaurus skeleton dominates a room in the College of Eastern Utah Prehistoric Museum.  (Gina Ferazzi / Los Angeles Times)

This Columbian mammoth on display at the Prehistoric Museum was discovered in Huntington Canyon near Price.  (Gina Ferazzi / Los Angeles Times)

An alligator swims in a tank at the Prehistoric Museum in Price.  (Gina Ferazzi / Los Angeles Times)

The setting sun shines on a reconstruction of an allosaur in the visitor center at the Cleveland-Lloyd Dinosaur Quarry in Cleveland, which boasts the densest collection of fossils in the world.  (Gina Ferazzi / Los Angeles Times)

Bob and Jane Davis of England take a look inside a pit at the Cleveland-Lloyd quarry that’s littered with dinosaur bones, some authentic, some replicas of bones that have been removed from the site.  (Gina Ferazzi / Los Angeles Times)

Bob and Jane Davis hike along the 1.4-mile Rock Walk at the Cleveland-Lloyd quarry, which features several hiking trails.  (Gina Ferazzi / Los Angeles Times)