Numerous archaeological sites in central Kansas near the Great Bend of the Arkansas River share common traits and are collectively known as the "Great Bend aspect." Radiocarbon dates from these sites range from AD 1450 to 1700. Great Bend aspect sites are generally accepted as ancestral to the Wichita peoples described by Francisco Vásquez de Coronado and other early European explorers. The discovery of limited quantities of European artifacts, such as chain mail and iron axe heads at several Great Bend sites, suggests contact of these people with early Spanish explorers.