Like the Mound Builders of the Ohio region, these tribes, probably influenced by Meso-American cultures through trade and commerce, built gigantic mounds as burial and ceremonial places.

• 像俄亥俄营冢文化部落一样，这些部落可能是通过商业贸易活动受到美国中部文化的影响，建起了庞大的土冢用于殡葬和举行仪式的场地。