601 research outputs found

    Osteology of Deinonychus antirrhopus, an unusual theropod from the Lower Cretaceous of Montana

    Get PDF
    A detailed description is presented of the skeletal anatomy and adaptations of Deinonychus antirrhopus Ostrom (1969), a very unusual carnivorous dinosaur (Order Saurischia, Suborder Theropoda) from the Cloverly Formation (Early Cretaceous) of Montana….https://elischolar.library.yale.edu/peabody_museum_natural_history_bulletin/1029/thumbnail.jp

    The pectoral girdle and forelimb function of Deinonychus (Reptilia: Saurischia): A correction

    Get PDF
    The first reports on Deinonychus antirrhopus Ostrom tentatively identified a solitary, incomplete bone from the Yale Quarry near Bridger, Montana, as a right pubis. Subsequent examination and comparison with remains of other taxa have established that bone to be a right coracoid of surprisingly large size. The element is redescribed here with a corrected reconstruction of the pectoral girdle and a revised interpretation of the relevant pectoral musculature and functions. The unusually large size of the coracoid is believed to be related to enlarged pectoral muscles that were important in some predatory activities

    On the systematic position of Macelognathus vagans

    Get PDF
    The holotype and only known specimen of Macelognathus vagans was placed in a separate reptilian order (Macelognatha) by O. C. Marsh in 1884. Restudy of the specimen and of other extensive collections from the Macelognathus site (Quarry Nine, Como Bluff, Wyoming) and a careful check of Peabody Museum records suggest that Macelognathus probably belongs to the Order Crocodilia

    Stratigraphy and paleontology of the Cloverly Formation (Lower Cretaceous) of the Bighorn Basin area, Wyoming and Montana

    Get PDF
    The nonmarine strata of the Bighorn Basin, lying between the Late Jurassic Sundance Formation and the Early Cretaceous Thermopolis Shale, have been subdivided into three formal units: the Morrison, Cloverly and Sykes Mountain Formations….https://elischolar.library.yale.edu/peabody_museum_natural_history_bulletin/1034/thumbnail.jp

    The Rocky Hill Dinosaurs

    Get PDF
    Guidebook for field trips in Connecticut: New England Intercollegiate Geological Conference 60th annual meeting, Yale University, New Haven, Connecticut, October 25-27, 1968: Trip C-

    Hadrosaurian dinosaurs

    Get PDF
    p. 37-186, [6] p. of plates : ill., maps ; 27 cm.Thesis (Ph. D.)--Columbia University.Includes bibliographical references (p. 178-186)

    Stapes

    Get PDF
    20 p. : ill. ; 24 cm.Includes bibliographical references (p. 19-20)

    The Marine light - mixed layer experiment cruise and data report, R/V Endeavor : cruise EN-224, mooring deployment, 27 April-1 May 1991, cruise EN-227, mooring recovery, 5-23 September 1991

    Get PDF
    The Marine Light - Mixed Layer experiment took place in the sub-Arctic North Atlantic ocean, approximately 275 miles south of Reykjavik, Iceland. The field program included a central surface mooring to document the temporal evolution of physical, biological and optical properties. The surface mooring was deployed at approximately 59°N, 21°W on 29 April 1991 and recovered on 6 September 1991. The Upper Ocean Processes Group of the Woods Hole Oceanographic Institution was responsible for design, preparation, deployment, and recovery of the mooring. The Group's contrbution to the field measurements included four different types of sensors: a meteorological observation package on the surface buoy, a string of 15 temperature sensors along the mooring line, an acoustic Doppler current profiler, and four instruments for measuring mooring tension and accelerations. The observations obtained from the mooring are sufficient to describe the air-sea fluxes and the local physical response to surface forcing. The objective in the analysis phase will be to determine the factors controlling this physical response and to work towards an understanding of the links among physical, biological, and optical processes. This report describes the deployment and recovery of the mooring, the meteorological data, and the subsurface temperature and current data.Funding was provided by the Office of Naval Research under Contract N00014-89-J-1683
    • …
    corecore