DIGGING FOR DINOSAURS
Rock&Gem Magazine|October 2022
Exploring Montana's Dinosaur Trail
AMY GRISAK
DIGGING FOR DINOSAURS

It's difficult to envision dinosaurs roaming the arid, expansive prairies and badlands of Central and Eastern Montana, yet this entire region provides remarkable opportunities for amateur paleontologists to explore this fascinating realm while they get their hands in the dirt.

Montana was a vastly different landscape than it is today. "It was warmer than it is now and there doesn't appear to be evidence of frozen polar ice caps," noted Eric Metz, paleontology collections manager of the Museum of the Rockies in Bozeman. The Western Interior Seaway stretched from the Rocky Mountains east to nearly Minnesota, with a humid landscape lush with ferns and gymnosperms, such as conifers and Ginkos.

This vegetation fed herbivorous dinosaurs like the Maiasauras, Cerasinops, a relative of the Triceratops, and the 90-foot-long Apatosaurus. These species, as well as smaller animals, were often food for the iconic Tyrannosaurus Rex, the smaller Troodons, or the "raptor" Deinonychus during the Jurassic and Cretaceous Periods.

"We have a lot of evidence of early birds. They had teeth, which was cool," said Metz who noted that there were also flying reptiles, which were not dinosaurs, and the Pterosaur was the largest creature that ever flew. "And you still had different species of lizards and frogs."

While we don't often envision it, Metz points out that there were three groups of mammals during this time, including the placentals, marsupials, and multituberculates, which had rows of cusped, interlocking teeth. These went extinct after the Cretaceous period for reasons unknown. And besides the land-dwelling animals, the inland sea teamed with life including the Plesiosaur, Mosasaur, and large marine turtles.

DIGGING UP THE PAST

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