Abstract
Known vertebrate fossil occurrences from Jurassic strata in the mines in the Grants uranium district are few. Here, we describe fragmentary teeth, skull, and jaw elements that probably pertain to the theropod dinosaur Allosaurus. These fossils were recovered from the Upper Jurassic Salt Wash (=Westwater Canyon) Member of the Morrison Formation in the underground workings of the Section 19 mine near Grants, New Mexico. If properly identified, these fossils are the stratigraphically lowest occurrence (LO) of Allosaurus in New Mexico and one of the oldest records of Allosaurus in the Morrison Formation.
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