U.S. Expedition Photos

A Triceratops skeleton from eastern Wyoming.


Field mapping of the skeleton of the Tyrannosaurus rex ‘Thomas’ (southeastern Montana).


Duck-billed dinosaur remains from eastern Wyoming.


The fossil-rich exposures of the Hell Creek Formation of Montana.


Quarry of the Tyrannosaurus rex ‘Thomas’ (southeastern Montana).


Southeastern Montana, with exposures in the background.


Lunch break at the quarry of the Tyrannosaurus rex ‘Thomas’ (southeastern Montana).


Plaster jackets containing the bones of Triceratops (eastern Wyoming).