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POVERTY POINT Earthworks

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Bianca
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« on: June 30, 2009, 04:36:12 pm »










Recent excavations and testing at the Poverty Point site by archaeologists from Washington University in St. Louis, Murray State University, and Tulane University have shown that the site inhabitants undertook a massive program of earthmoving and reshaping the natural landscape. This effort included leveling natural ridges, filling undulating gullies, and the construction of the mounds and ridges that now form the most visible aspect of the site.  The total volume of earth moved for the Poverty Point earthworks consists of between 750,000 and 1,000,000 cubic meters.

Although it was previously thought that construction of the earthen mounds at Poverty Point occurred gradually over hundreds of years, recent research has shown that Mound A was in fact constructed quickly, probably over a period of less than three months.  Prior to construction, the vegetation covering the site was burned. According to radiocarbon analysis, this burning occurred between approximately 1450 and 1250 BC. The area was then immediately covered with a cap of silt, followed immediately by the main construction effort. There are no signs of construction phases or weathering of the mound fill even at microscopic levels, indicating construction occurred in a single massive effort over a very short period.  In total volume, Mound A is made up of approximately 238,000 cubic meters of fill, making it the second largest earthen mound (by volume) in eastern North America.

In 2009, the University of Louisiana at Monroe and Mississippi State University at Starkville began digging on the plaza in the center of the rings to search for the cause of small variations in the magnetic field, that were found since 2000 by Magnetic gradiometry surveys. The data indicate the presence of earthen circles 80-to-160 feet wide beneath the surface of the ground.
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