North America, probably Montana, Two Medicine Formation, or nearby, Upper Cretaceous, ca. 71,000,000 million years ago. A well-preserved fossilized egg from the hadrosauridae family, with the eggshell texture nicely preserved, with a cracked surface that is the result of the deposition process. A "window" - believed by researchers to be the result of the decay/putrefaction process - is visible on one side of the egg. The Hadrosaurids are also known as the duck-billed dinosaurs. Size: 5.75" W x 4.25" H (14.6 cm x 10.8 cm)
The Two Medicine Formation is a geologic formation from 83.5 to 70.6 million years ago found in northwestern Montana and southern Alberta, east of the Rocky Mountains. It consists of deposits from the western shoreline of the Late Cretaceous Interior Seaway, mostly of sandstone. This interstitial zone between the nascent Rockies and the Seaway, where dinosaurs grazed and hunted along the shoreline, is one of our most fertile fossil-finding grounds, and many of our beloved dinosaur species originated in discoveries from this area. This location is famous for its hadrosaur finds, including the discovery of baby hadrosaurs and nesting sites in the early 1990s. These helped revolutionize thinking about dinosaurs, shifting them away from the old view as uncaring lizards to the currently accepted view of more bird-like creatures who lived in family units.
Provenance: A Coin Exchange, Tarzana, California, USA
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#146017
Condition
Egg has been prepped, with its original matrix retained on the underside. The "window" has been sealed with a protective thin plastic coating. Small losses from eggshell surface.