|Excavating Apatosaurus vertebrae, Dinosaur National Monument, Utah|
|The Morrison Formation was created between 145 and 135 million years ago.|
|Stegosaurus model, top; fossil leg and foot bones, below|
|Quarry and Visitor Center, Dinosaur National Monument|
|Hike in Hog Canyon, Dinosaur Nat. Mon.|
Planning a Visit: For more information and planning a visit to Dinosaur National Monument, go to the National Park Service website at http://www.nps.gov/dino/index.htm .