Cleveland Lloyd Dinosaur Quarry

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The Cleveland Lloyd Dinosaur Quarry National Natural Landmark (designated a National Natural Landmark in 1966) is located about 30 miles south of Price, Utah, USA. The area contains the densest concentration of Jurassic dinosaur bones ever found: well over 15,000 bones have been excavated from this Jurassic 'predator trap' and there are many thousands more awaiting excavation and study.

The visitor center is administered by the Bureau of Land Management, Price Field Office, (435)636-3600. There is a skeleton reconstruction of a young Allosaurus (and other bones) on display in the visitor center.

Picnic tables, water in open season, restrooms and several hiking and nature trails available. Open daily from Memorial Day through Labor Day. Open week-ends only, from March through Memorial Day.

The quarry visitor center was closed for renovations on August 1, 2006 and is expected to re-open in March 2007.

1 Paleofauna
2 History
3 External links
4 References

[edit] Paleofauna

Fossil taxa discovered at the Cleveland-Lloyd site include:

Plantae
- Thallophyta
  - Aclistochara
  - Latochara
  - Stellatochara
Animalia
- Mollusca
  - Gastropoda
    - Amplovalvata
    - Amplovoluta
    - Valvata
    - Viviparus
- Chordata
  - Chelonia
    - Glyptops
  - Saurischia
    - Sauropoda
      - Amphicoelias
      - Barosaurus
      - Camarasaurus
      - Haplocanthosaurus
    - Theropoda
      - Allosaurus
      - Ceratosaurus
      - Marshosaurus
      - Ornitholestes
      - Stokesosaurus
  - Ornithischia
    - Iguanodontia
      - Camptosaurus
    - Thyreophora
      - Stegosaurus

[edit] History

The quarry was found by sheepmen and cowmen as they drove their animals through the area. Lee and Grant Stokes located the find and took some bones to the University of Utah. In 1927, the Department of Geology at the University of Utah, under the direction of Chairman F.F. Hintze, visited the area and collected 800 bones. In 1939, a field party from Princeton University led by William Lee Stokes began work. In three summers, they collected 1,200 bones. The quarry was not worked again until 1960. In 1974, a new dinosaur was discovered by James H. Madsen, Jr., Assistant Research Professor of Geology and Geophysics, University of Utah, making him the first person to discover a new dinosaur out of the Morrison Formation in 75 years. He named it Stokesosaurs clevelandi. In 1979, another new dinosaur was found in the quarry by Madsen. He named it Marshosaurs bicentesimus.