Highlights from the Cretaceous

During the Cretaceous, seas covered parts of New Mexico, and along their shorelines lived some of the last dinosaurs. This exhibit explores the interplay of land and sea environments in Cretaceous New Mexico that preceded the final extinction of the dinosaurs.

Below are some of the features in the New Mexico's Seacoast exhibit.

Click Here to Download a floor plan of this hall (PDF)


The age of dinosaurs comes to an end.

Meteor Impact

Mass extinction at the end of the Cretaceous is popularly believed to have been caused by an asteroid collision with Earth.


Fossilized dinosaur dung found in northwest New Mexico.


Trace fossil of Tyrannosaurus rex found near Raton, New Mexico.

Bistahieversor Skull

Nearly complete skull found in the Kirtland Formation in San Juan County, New Mexico.

Bistahieversor Illustration

New Mexico's top predator along its Cretaceous seacoast.

Pentaceratops Skull

Pentaceratops takes its name, which means "five-horned face," from the five horns--one above the nostril, two above the eyes and one on each cheek.


Resident Pentaceratops, Spike, stands guard outside of the entrance to the museum.

Sphaerotholus Skull Dome

From the Kirtland Formation near Farmington, New Mexico.

Nodocephalosaurus Skull

Skull of an Ankylosaur found near Farmington, New Mexico.


Armored plant eaters who migrated between Asia and North America during the Late Cretaceous.

Parasaurolophus Tubicen

It is likely that the crest was used to produce visual signals and to create distinctive sounds.

Hadrosauridae - Hadrosaur Skin Impression

Trace fossil found in Hidalgo County, New Mexico.

Parasaurolophus Nest

Juvenile and hatching Parasaurolophus.

Under the Cretaceous Sea

Karen Carr painted this mural of New Mexico's bustling seacoast of the Cretaceous Period.