Dino-Data Card # 1Through the work of Jack Horner and other scientists, it has been learned that several different dinosaurs lived at the same time (roughly 80 million years ago) in Montana. Three of these dinosaurs were Orodromeus (mountain runner), a swift plant eater; Troödon (wounding teeth), a small but fierce predator (carnivore); and Maiasaura (good mother lizard), a larger herbivore. There is good fossil evidence to show that all three laid eggs in nests. The nesting sites included two islands surrounded by a shallow alkaline lake. The environment at that time included volcanoes and a few mountains to the west (not the Rockies, as they were in the process of uplifting) and to the east, a warm interior seaway, which divided North America from north to south. |
Dino-Data Card # 2
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