Arkansaurus fridayi ~ The only dinosaur bones found in Arkansas that have been brought to the attention of the scientific community. In August 1972, Joe B. Friday discovered the fossils of the right hind foot in a gravel pit near his land in Lockesburg (Sevier County). The bones were in rocks of the Lower Cretaceous Trinity Group from approximately 146 -100mya. UA professor James Harrison Quinn gave it the informal name “Arkansaurus fridayi” in 1973. Interesting article at site.