July 3, 2018
New Research on Ancient Louisiana Mounds
Archaeological researchers in Louisiana, using sediment coring, radiocarbon dating, carbon-isotope analysis, optically stimulated luminescence at the Grand Caillou mound are trying to find how ancient peoples in the area chose their village sites. The Grand Caillou Mound was built in stages over several hundred years, ending in 800 CE. The village construction began in 1200 CE. They confirmed that building the mound in layers with clay at the bottom, loose sediments in the middle and clay on top was a way that mound builders built mounds to withstand the elements.
Mound building in America began at 4,500 BCE near resource rich waterways. The Grand Caillou Mound village had a population of 500 people at a time. Ceramics there have been dated to 1000-1400 CE when the site was abandoned, due to saltwater incursion at the site over time.
The research appears in the Journal of Island and Coastal Archaeology
Science Daily has the report here;
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