Como Bluff | |
 Multicolored (variegated) beds of the Morrison Formation at Como Bluff, Wyoming. Many historical dinosaur sites are located along the flanks of the bluff. The Sundance Formation is visible as the reddish beds at the base of the bluff. | |
   | |
| Location | taken near Aurora Lake (a.k.a. Como Lake). |
|---|---|
| Nearest city | Rock River-Medicine Bow |
| Coordinates | 41°54′58″N 106°03′51″W / 41.91611°N 106.06417°W |
| NRHP reference No. | 73001925 |
| Added to NRHP | January 18, 1973 |
Como Bluff is a long ridge extending east–west, located between the towns of Rock River and Medicine Bow, Wyoming. The ridge is an anticline, formed as a result of compressional geological folding. Three geological formations, the Sundance, the Morrison, and the Cloverly Formations, containing fossil remains from the Late Jurassic of the Mesozoic Era are exposed.
Nineteenth-century paleontologists discovered many well-preserved specimens of dinosaurs, as well as mammals, turtles, crocodilians, and fish from the Morrison Formation. Because of this, Como Bluff is considered to be one of the major sites for the early discovery of dinosaur remains. Among the species discovered is the only known specimen of Coelurus. Significant discoveries were made in 22 different areas scattered along the entire length of the ridge. It is included on the National Register of Historic Places as well as the National Natural Landmark list.