Authorities say a skull found on a Skunk River sandbar in Ames was that of a woman of American Indian ancestry who died more than 200 years ago.
Experts say the woman likely was 25 to 40 years old when she died. The experts have not determined the cause of her death.
Ames police say a person walking along the river found the skull on July 2. Officials said heavy rains may have washed the skull down the river.
The skull and another bone fragment will be turned over to the Office of the State Archaeologist.