UCMP’s summer adventures (cont.)

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work included the re-evaluation of the North American Triassic dinosaur record, as well as the complete description of an unusual Triassic archosaur, Revueltosaurus callenderi. At the end of May, Randy and Sterling headed to Ghost Ranch, New Mexico, to work with Alex Downs (Ruth Hall Museum of Paleontology) on early dinosaur material. In doing preliminary excavation at a new site, they were astounded by the quantity and diversity of material present and hope to return for several weeks next summer with a larger crew to excavate the bonebed more extensively. The next stop was northeastern Arizona, where Sterling and Randy joined Nate Smith (University of Chicago) and Alan Turner (AMNH/Columbia University) to prospect for vertebrates. The goal of this work is to better understand the faunal turnover at the Triassic-Jurassic boundary. Field Season #2 included four days with fellow UCMP students, Nick Pyenson and Jenny McGuire, at the Sharktooth Hill locality east of Bakersfield, CA (read about Nick’s adventures later in this article), and trips to San Jose to assist Mark Goodwin in the excavation of the San Jose mammoth. Randy made one last trip late in the summer, this time to Rio de Janeiro, Brazil. Here, he presented some of his (and Sterling’s) Triassic dinosaur research at the II Latin American Congress of Vertebrate Paleontology and visited collections to study Late Triassic basal archosaurs and dinosaurs from Brazil for comparison with contemporary North American forms.


Brian Kraatz returned to Mongolia to continue his research on Eocene and Oligocene geochronology and mammalian faunal change. He once again collaborated with Drs. R. Barsold and D. Badamgarav of the Paleontological Centre of the Mongolia Academy of Sciences. He was also accompanied by Faysal Bibi (Yale) who completed his undergraduate degree at Cal in 2003. The three-week expedition revisited Eocene and Oligocene

Brian Kraatz returned to Mongolia
Grad student Brian Kraatz returned to Mongolia to collect early Tertiary mammals. (photo by Brian Kraatz)

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