Sequoyah County Sheriff Johnny Philpot said the discovery was made south of Moffett by the Arkansas River.
"It's pretty old by looking at it," Philpot said.
The skull has been sent to the state medical examiner's office to make a determination on how hold it is. Philpot said the medical examiner's office uses an anthropologist to do the testing.
Moffett Police received the first call about the skull. Moffett officers then notified Philpot's office and the Oklahoma State Bureau of Investigation.
Philpot said his office has found other human bones before that turned out to be Indian that were over 100 years old. He said the chances are that this skull is really old. He noted that there is an Indian cemetery in the area in which the skull was found. He said the skull was mostly intact and had most of its upper teeth.
He said his office will first get a date on the skull before deciding on whether to do an excavation.
He confirmed that a few other bones were found in the area, but those are believed to be animal bones.
