Illustrated information panel depicting the dinosaurs of the Cretaceous Period (Niobrara Formation), 80 million years ago, at the Garden of the Gods Visitor and Nature Center, at the Garden of The Gods, an area of geological rock formations protected as a public park, near Colorado Springs, Colorado, USA. Ancient marine animal known as Plesiosaurs, along with sharks and relatives of the modern nautilus called ammonites, prowled the deep ocean waters of the Cretaceous Seaway, which then covered central Colorado. The Garden of the Gods was listed as a National Natural Landmark in 1971. Picture by Manuel Cohen
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