Montana State University Scientist Contributes To Latest Dinosaur Discovery

November 25, 1998

BOZEMAN, MONT.--A Bozeman, Mont., woman took particular notice of recent news that scientists had found a rare dinosaur embryo in the Patagonia region of Argentina.

Frankie Jackson, a research associate in the Museum of the Rockies and earth sciences department at Montana State University-Bozeman, is one of six scientists who described the discovery in the Nov. 19 issue of the journal Nature.

Photographs from the expedition appear in the December issue of National Geographic.

The Nature paper tells of rare embryos from a dinosaur nesting site covered with thousands of eggs over about one square mile. Jackson helped confirm that the fossilized embryos belong to sauropods--huge plant-eating dinosaurs like Apatosaurus, which used to be called Brontosaurus.

"I think this is a very exciting discovery. Extremely important," said Museum of the Rockies paleontologist Jack Horner.

Dinosaur embryos are rare, he said. Only six others have been found throughout the world.

"The exciting thing about this is we finally have identifiable embryonic remains inside an egg," said Jackson.

Scientists have identified sauropod eggs based on bones found in the same sediments as the eggs, but that method hasn't been accurate, she added.

It's also the first embryo retrieved from the Southern Hemisphere and the first to contain fossilized skin from baby dinosaurs.

Jackson was not on the expedition last spring that initially discovered the 70 million- to 90-million-year-old egg site. Scientists from the American Museum of Natural History in New York and Argentina's Museo Municipal Carmen Funes found the nesting ground where thousands of dinosaurs may have gathered to lay their eggs.

American Museum paleontologist Luis Chiappe contacted Jackson after learning from a colleague that she studies fossilized egg shells. Chiappe asked her to join the project and describe the eggs found in Argentina.

Jackson looked at thin sections of shell fragments under two microscopes. One is a powerful scanning electron microscope in the university's Image and Chemical Analysis Laboratory, which funded her project.

Jackson saw a bumpy surface, straight pores and distinctive shell "units" reaching from the inside to the outside of the shell. She could also see horizontal growth lines in the shell that look like tree rings. Those growth lines, as well as the general appearance of the shell, told her the sample was "minimally altered," she said.

"The preservation in these eggs is pretty amazing," she said.

Her initial microscopic analysis proved the eggs belonged to dinosaurs rather than to birds or crocodiles. Other evidence--such as the embryos and teeth found at the site--confirmed that the animals were sauropods. As a result, Jackson said, the new research conclusively links the egg to a particular type of dinosaur.

The American Museum of Natural History has asked Jackson to join the expedition's return trip to South America in March. She'll be in charge of data collection at the field site.

"There seems to be an incredible amount of material," she said. "They didn't do a lot of collecting [last year] because the discovery came at the end of the field season."

Jackson has several other egg research projects under way, and last year she co wrote a Nature article on the evolution of dinosaur reproductive traits. She's also taught geology and paleontology at the Museum of the Rockies field school near Choteau, Mont., for 10 years.

"It's mostly my experience at Egg Mountain that got me involved in the expedition to South America this spring," Jackson said.

She first visited Egg Mountain 11 years ago with her son and his two cousins. The experience changed her life, Jackson said. The geology, more than the dinosaurs, captivated her interest.

She signed on the same summer as a camp cook and later earned a degree from the University of Montana. Currently she does research in the MSU earth sciences department and at the Museum of the Rockies.

Montana State University

Related Dinosaur Articles from Brightsurf:

Cracking the secrets of dinosaur eggshells
Since the famous discovery of dinosaur eggs in the Gobi Desert in the early 1920s, the fossilized remains have captured the imaginations of paleontologists and the public, alike.

Dinosaur feather study debunked
A new study published in ''Scientific Reports'' provides substantial evidence that the first fossil feather ever to be discovered does belong to the iconic bird-like dinosaur, Archaeopteryx.

How to weigh a dinosaur
A new study looks at dinosaur body mass estimation techniques revealing different approaches still yield strikingly similar results.

How dinosaur research can help medicine
The intervertebral discs connect the vertebrae and give the spine its mobility.

New species of dinosaur discovered on Isle of Wight
A new study by Palaeontologists at the University of Southampton suggests four bones recently found on the Isle of Wight belong to new species of theropod dinosaur, the group that includes Tyrannosaurus rex and modern-day birds.

First dinosaur eggs were soft like a turtle's
New research suggests that the first dinosaurs laid soft-shelled eggs -- a finding that contradicts established thought.

To think like a dinosaur
Palaeontologists from St Petersburg University have been the first to study in detail the structure of the brain and blood vessels in the skull of the ankylosaur Bissektipelta archibaldi.

New feathered dinosaur was one of the last surviving raptors
Dineobellator notohesperus lived 67 million years ago. Steven Jasinski, who recently earned his doctorate from the School of Arts and Sciences working with Peter Dodson, also of the School of Veterinary Medicine, described the find.

The dinosaur in the cupboard under the stairs
The mystery surrounding dinosaur footprints on a cave ceiling in Central Queensland has been solved after more than a half a century.

How did dinosaur parents know when their kids had a fever?
How Did Dinosaur Parents Know When Their Kids Had a Fever?

Read More: Dinosaur News and Dinosaur Current Events is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to