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21-Mar-2019 15:00

Some of the food remnants, stone tools and artifacts were buried underneath 7 (23 feet) to 30 meters (98.5 feet) of human-made mound deposits.

They found that the sites were occupied intermittently between 15,000 years ago and 10,000 years ago.

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The scientists found traces of avocado, beans and possibly squash and chili pepper that were cultivated. The new conclusions suggest diverse food production strategies and knowledge of economic organization, the paper states.Some of the mounds do not have evidence of human culture in them for hundreds of years at a time.Basket and mat remnants show they were made from various materials, including reeds that basket makers still use today.Radiocarbon ages indicate an intermittent human presence dated between ~15,0 calendar years ago before the mound was built.The absence of fishhooks, harpoons, and bifacial stone tools suggests that technologies of gathering, trapping, clubbing, and exchange were used primarily to procure food resources along the shoreline and in estuarine wetlands and distant mountains.

The scientists found traces of avocado, beans and possibly squash and chili pepper that were cultivated. The new conclusions suggest diverse food production strategies and knowledge of economic organization, the paper states.

Some of the mounds do not have evidence of human culture in them for hundreds of years at a time.

Basket and mat remnants show they were made from various materials, including reeds that basket makers still use today.

Radiocarbon ages indicate an intermittent human presence dated between ~15,0 calendar years ago before the mound was built.

The absence of fishhooks, harpoons, and bifacial stone tools suggests that technologies of gathering, trapping, clubbing, and exchange were used primarily to procure food resources along the shoreline and in estuarine wetlands and distant mountains.

Hundreds of thousands of artifacts dating back as early as 15,000 years have been found at the ancient mound site of Huaca Prieta in Peru.