Dinosaur fossils in Utah
The Paleobiology Database records 602 non-avian dinosaur finds in Utah, from 78 genera. The oldest is Megapnosaurus from the Hettangian age, about 201.4 million years old. The youngest is Alamosaurus sanjuanensis from the Late Maastrichtian age, as young as about 66 million years. Ages are the range the database gives for the rocks, so a find can be tens of millions of years across.
- 602finds
- 78genera
- 201.4oldest, million years ago
- 66youngest, million years ago
It ranks 4th of 36 US states on the map by number of finds, with 11% of the finds in the United States. The most recorded dinosaurs are Allosaurus (17), Camarasaurus (16) and Eolambia (12). The rock formation with the most finds is called Cedar Mountain, with 175.
Utah has finds from more than one period, so use the age slider on the map to see which dinosaurs belong to which age.
Which dinosaurs were found in Utah?
The genera with the most finds here:
| Dinosaur | Finds |
|---|---|
| Allosaurus | 17 |
| Camarasaurus | 16 |
| Eolambia | 12 |
| Stegosaurus | 12 |
| Apatosaurus | 11 |
| Utahceratops | 9 |
| Camptosaurus | 8 |
| Dryosaurus | 7 |
| Richardoestesia | 6 |
| Barosaurus | 5 |
Rock formations with dinosaur finds in Utah
| Formation | Finds |
|---|---|
| Cedar Mountain | 175 |
| Morrison | 145 |
| Kaiparowits | 51 |
| Wahweap | 39 |
| Masuk | 30 |
| Iron Springs | 23 |
| North Horn | 19 |
| Navajo Sandstone | 14 |
| Straight Cliffs | 13 |
| Kayenta | 11 |
Other US states to explore
- Wyoming (1,040)
- Montana (985)
- New Mexico (832)
- Colorado (484)
- Texas (448)
- North Dakota (237)
- Arizona (167)
- South Dakota (167)
- New Jersey (70)
- Oklahoma (62)
See the sea floor where marine reptiles swam: oceanfloormap.com →
Before you go fossil hunting. A dot shows where a find was recorded, not where you may dig. Many fossil sites are on private or protected land and collecting rules differ by country. Check the rules before collecting and never dig on protected sites.