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In Images: An Apatosaurus Discovery

Morrison Museum

Morrison Museum front

(Image credit: Stephanie Pappas for LiveScience)

The Morrison Natural History Museum is a small teaching museum located in the Colorado foothills town of Morrison.

Preparing Kevin

Kevin preparation

(Image credit: Stephanie Pappas for LiveScience)

Matthew Mossbrucker demonstrates an airscribe tool used to remove concrete-like sandstone from around the fragile fossil. He and his colleagues have been working on this boulder for two years.

Apatosaurus Illustration

Apatosaur Kevin

(Image credit: Stephanie Pappas for LiveScience)

A whiteboard illustration in the Morrison Natural History Museum's prep lab shows which part of the skull is represented in the rock.

Kevin's Snout

Kevin maxilla and premaxilla

(Image credit: Stephanie Pappas for LiveScience)

The boulder contains snout bones, known as the maxilla and premaxilla, of a Jurassic beast.

Apatosaurus Limb

Apatosuarus forelimb

(Image credit: Stephanie Pappas for LiveScience)

The first Apatosaurus specimens were found in Morrison, just west of Denver. This right forelimb is on display at the Morrison Natural History Museum. It was discovered in 1878. White plaster holds the fragile bone together.

Quarry Five

Quarry 5 on Dinosaur Ridge

(Image credit: Stephanie Pappas for LiveScience)

A short drive from the Morrison museum is Quarry 5, where the boulder containing Kevin was found. The boulder had eroded out of the hillside and was sitting at the base of this outcrop.

Quarry Five at Dinosaur Ridge

Quarry 5 on Dinosaur Ridge

(Image credit: Stephanie Pappas for LiveScience)

Quarry 5 is maintained by a volunteer group, Friends of Dinosaur Ridge, and is open for tours.

Bones at Quarry 5

Dinosaur bone at Quarry 5

(Image credit: Stephanie Pappas for LiveScience)

Dinosaur bones are visible in the sandstone at Quarry 5. Here, Matthew Mossbrucker examines an unidentified limb bone.

Apatosaurus Prep

Apatosaurus sign

(Image credit: Stephanie Pappas for LiveScience)

Museum staff are working to prep a surprising fossil find: The first-ever snout of an Apatosaurus ajax, the largest apatosaurus species.

Kevin the Apatosaur

Kevin the apatosaur

(Image credit: Stephanie Pappas for LiveScience)

Dubbed "Kevin," a new apatosaur muzzle is embedded in a sandstone boulder with a jumble of other Jurassic animal remains.

Matthew Mossbrucker and Kevin

Apatosaur Kevin

(Image credit: Stephanie Pappas for LiveScience)

Morrison Natural History Musuem director Matthew Mossbrucker with "Kevin," a new Apatosaurus specimen found near Denver, Colo.