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11---ammonite---mississippian
The Green River system was composed of three lakes: Lake Ulinta
in what has been designated the Cradle of Humankind World Heritage Site
Left and right orbits mostly original bone and matrix
This authentic Spinosaurus tooth was found in Morocco
Monodon monoceros, narwhal tusk T-Rex 11---ammonite---mississippianThe narwhal, or narwhale (Monodon monoceros), is a medium sized toothed whale and possesses a large "tusk" from a protruding canine tooth. It lives year round in the Arctic waters around Greenland, Canada, and Russia. It is one of two living species of whale in the Monodontidae family, along with the beluga whale. The narwhal males are distinguished by a long, straight, helical tusk, which is an elongated upper left canine. The narwhal was one of many