a-dinosaur-a-day: Marshosaurus(MARSH-oh-SORE-us) where: Woodlands of North America when: Late Jurassic Period, about 155 to 150 million years ago who: Named and described by James Madsen in 1976 what: About 20 feet long and 1000 pounds, the Marshosaurus
a-dinosaur-a-day: Marshosaurus(MARSH-oh-SORE-us) where: Woodlands of North America when: Late Jurassic Period, about 155 to 150 million years ago who: Named and described by James Madsen in 1976 what: About 20 feet long and 1000 pounds, the Marshosaurus