Which u.s. State Claims the Stegosaurus as Its Official State Fossil?

Which U.S. State Claims the Stegosaurus as Its Official State Fossil?

The United States is known for its diverse and unique states, each with its own set of symbols and emblems that represent its history and culture. One fascinating aspect of state symbolism is the designation of an official state fossil. Fossils provide valuable insights into the ancient history of our planet and the creatures that once roamed its surface. One such fossil is the Stegosaurus, a herbivorous dinosaur known for its distinctive spiked tail and back plates. So, which U.S. state proudly claims the Stegosaurus as its official state fossil? Let’s delve into the story behind this prehistoric symbol.

The state that claims the Stegosaurus as its official state fossil is Colorado. In 1982, the Colorado State Legislature designated the Stegosaurus as the official state fossil, honoring the significance of this dinosaur in the state’s paleontological history. Colorado is renowned for its rich fossil deposits, particularly those from the Late Jurassic period, which date back around 155 to 150 million years ago. During this era, the region was a lush floodplain, teeming with diverse plant and animal life. Fossils found in Colorado provide a fascinating glimpse into this ancient ecosystem.

The Stegosaurus, whose name translates to “roof lizard,” lived during the Late Jurassic period. It was a herbivorous dinosaur that grew up to 30 feet long and weighed around 5,000 pounds. This dinosaur is instantly recognizable due to its double row of large, triangular plates running along its back, alternating with sharp spikes on its tail. Scientists believe that these plates and spikes served different purposes, from temperature regulation to defense against predators.

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Why did Colorado choose the Stegosaurus as its official state fossil? The decision reflects the abundance of Stegosaurus fossils found within the state’s borders. In fact, the first Stegosaurus fossil ever discovered was unearthed near Morrison, Colorado, in 1877. Since then, numerous Stegosaurus specimens have been found throughout the state, making it an integral part of Colorado’s paleontological heritage. The Stegosaurus symbolizes the rich fossil resources in Colorado and highlights the state’s commitment to preserving its unique geological history.


Q: Are there any other states with official state fossils?
A: Yes, several other states have designated official state fossils. For example, Wyoming claims the Triceratops as its official state dinosaur, while Maryland recognizes the Calvert Cliffs and the fossilized teeth of the extinct Megalodon shark as its state fossils.

Q: Are there any other dinosaur fossils found in Colorado?
A: Yes, Colorado is home to an array of dinosaur fossils, including those of the Allosaurus, Apatosaurus, and Diplodocus. These fossils have provided valuable insights into the diversity of dinosaur species that once inhabited the region.

Q: Can I see Stegosaurus fossils in Colorado?
A: Yes, many Stegosaurus fossils are on display in various museums across Colorado. The Denver Museum of Nature & Science is particularly renowned for its extensive collection of Stegosaurus fossils, including a nearly complete skeleton named “Stan.”

Q: Are Stegosaurus fossils found only in the United States?
A: No, Stegosaurus fossils have been discovered in other parts of the world as well, including Portugal, China, and England. However, the abundance of these fossils in Colorado has contributed significantly to the state’s recognition of the Stegosaurus as its official state fossil.

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Q: Can I visit any fossil sites in Colorado?
A: Yes, there are several fossil sites in Colorado that are open to the public. For example, Dinosaur National Monument near Jensen, Utah, and Colorado is a popular destination for dinosaur enthusiasts, allowing visitors to view and learn about fossils in their natural settings.

In conclusion, the Stegosaurus holds a special place in Colorado’s history and identity, prompting the state to designate it as its official state fossil. This iconic dinosaur serves as a reminder of the incredible diversity of life that once thrived in the region millions of years ago. Colorado’s recognition of the Stegosaurus underscores the state’s commitment to preserving its unique paleontological heritage for future generations to admire and learn from.