New dinosaur fossils found under a parking lot reveal a 100-year-old secret in Colorado (Image source: National Park Service)
You never really expect to stumble across dinosaur bones while fixing up a parking lot, but that’s exactly what happened at Dinosaur National Monument, on the border of Colorado and Utah. Workers were just doing some routine upgrades near the Quarry Exhibit Hall when they hit a layer of sandstone packed with fossils. It’s the first time anyone’s found fossils here in more than a century.All of this kicked off on September 16, 2025. Crews started tearing up the old asphalt, and suddenly, bones that hadn’t seen daylight since the early 20th century. The construction teams stepped back so the palaeontologists could step in and figure out what they’d found, making sure nothing got damaged in the process.What really makes this discovery stand out is where it happened. The site sits right next to the legendary “Wall of Bones,” a spot that’s already taught us tons about dinosaurs from the Late Jurassic. Even after all these years and all that research, this place still had secrets to share. The find demonstrates that even well-studied areas can still hold incredible prehistoric treasures waiting to be uncovered.
The dinosaur fossil found in Colorado belonged to which dinosaur
According to the National Park Service, the bones likely belong to a large, long‑necked dinosaur, most likely a Diplodocus, which is a common sauropod species from the Late Jurassic period. Teams, including park staff, volunteers, and the Utah Conservation Corps, removed roughly 3,000 pounds of rock and fossil material during the excavation. These fossils are now being cleaned and studied at the Utah Field House of Natural History State Park Museum in Vernal, Utah. Some pieces are already on display at the Quarry Exhibit Hall.
Why this discovery matters
This discovery is important due to the following reasons:
- First excavation in over a century: The site near the Quarry Exhibit Hall has not been excavated for fossils since 1924. This makes this occasion one of the rare ones.
- Scientific value: New fossils offer additional data about dinosaur diversity, anatomy, and ecosystem dynamics in the Late Jurassic era, especially at a location already rich with well‑preserved specimens.
- Public engagement: Visitors can watch fossil preparation in real time at the museum, giving the public a behind‑the‑scenes view of palaeontology in action.
Dinosaur National Monument: A fossil hotspot
Dinosaur National Monument is best known for its ‘Wall of Bones‘, which is a huge stretch of rock packed with about 1,500 dinosaur fossils, still right where they landed ages ago. This spot used to be an old riverbed, and over millions of years, dinosaurs and all kinds of other animals got buried and turned to stone here. That’s why it’s one of the top places in North America for Late Jurassic fossils. As researchers dig up and study more of these bones, they keep learning more about what life was like back then and what kind of world these ancient creatures called home.
