Dr. Chris Shelton and student Kolby Dooling unearthed a rare, well-preserved ammonite fossil at a site in Oklahoma, and it ...

Based on the fossil record, ammonites came in a wide range of sizes and shapes, from smaller than an inch to as large as nine feet wide. Some ammonites had long, straight shells, while others had ...

These animals are known from the Jurassic Period, from about 200 million years ago. Most ammonites died out at the same time as the non-avian dinosaurs, at the end of the Cretaceous Period, 66 million ...

A professor and a student from RSU unearthed a rare exceptionally preserved fossil gemstone. Professor Dr. Chris Shelton and ...

Most ammonites died out 66 million years ago, at the same time as dinosaurs. Fossilised ammonite shells can be found all around the world, including on parts of Britain's coastline. But if you can't ...

Fossils found in the northern part of Hokkaido are a new type of ammonite, the once-ubiquitous spiral-shelled creatures that went extinct with the dinosaurs 65 million years ago, researchers said.

Much of this rich life—including all dinosaurs, pterosaurs, pliosaurs, and ammonites—perished in the extinction event at the end of the period 65 million years ago. In fact, the land ...

Dinosaur fossils dating back 66 million years ... including ostracod and ammonite fossils from the early Jurassic and Devonian periods (about 190 million to 400 million years ago).