Warnock Publishes on Depositional History of Cleveland-Lloyd Dinosaur Quarry

Posted on 6/12/2017 10:31:07 AM

A collaborative effort between Jonathan Warnock  and the University of Wisconsin, Oshkosh and Parkside branches, has lead to a reanalysis of a historic dinosaur quarry. The Cleveland-Lloyd Dinosaur Quarry has been excavated since the 1920s. This new paper seeks to explain the depositional history of the quarry, despite a century of debate.

CLDQ is historic in that, unlike other Jurassic dinosaur bonebeds, it is dominated by the predatory dinosaur, Allosaurus fragilis. This paper, titled “New data towards the development of a
comprehensive taphonomic framework for the Late Jurassic Cleveland-Lloyd Dinosaur Quarry, Central Utah,” presents new data from small bone fragments, mineral growths on the historic whole bones, geochemistry, and mineralogy of the quarry.

These data reveal that the quarry represents periods of drought and flood, incorporating well-weathered bones created during drought stages, and more recent corpses washed in during floods. Importantly, the data reveal that the Allosaurus preserved at the quarry did not die there. Future work will continue to address the mystery of Cleveland-Lloyd: why so many Allosaurus?

Peterson JE, Warnock JP, Eberhart SL, Clawson SR, Noto CR. (2017) New data towards the development of a comprehensive taphonomic framework for the Late Jurassic Cleveland-Lloyd Dinosaur Quarry, Central Utah. PeerJ 5:e3368 https://doi.org/10.7717/peerj.3368

Department of Geoscience