Significant archaeological remains of Patayan cultures appear near 875 A.D. and many cultural characteristics continued into historic times. The Patayan Culture may have originally emerged along the Colorado River, extending from the area around modern Kingman northeast to the Grand Canyon. These people appear to have practiced floodplain agriculture, a conclusion based on the discovery of manos and metates used to process corn in these areas. Stone points and other tools for hunting and hide preparation have been found, suggesting an economy based both on agriculture and hunting and gathering.