In 2000 and 2001, scientists discovered two pieces of fossilized (and therefore, mummified in one sense of the word) dinosaur skin at the newly-created Grand Staircase-Escalante National Monument in southern Utah. 

 

What does it look like

Pictured above are the tailbone and left leg of the Escalante hadrosaur.

 

Unknown. Some scientists believe that this location may become one of the foremost dinosaur sites in the world.

The first discovery was a four-inch square piece of duckbill dinosaur skin, perhaps the 25th time that such a piece of skin has been found in the world. Shortly afterwards, scientists discovered a larger piece of skin from a hadrosaur, a large dinosaur that ate plants.

The fossilized skin is now on display at the Museum of Northern Arizona in Flagstaff. 

Dinosaur Mummies: Beyond Bare-Bone Fossils by Kelly Milner Halls takes the reader on a chronological tour of various dinosaur mummy discoveries, starting with the 1908 discovery of the Sternberg mummies. She moves on to other fossilized discoveries, including the baby dinosaur in Italy. Highly readable and highly recommended for kids.

Information on other dinosaur and dinosaur mummy books