Mound Builders in North American prehistory have been classified as four different cultural groups:
Poverty Point Culture Northern Louisiana 1800-500 BCE
Aldena Culture Ohio valley 1000 BCE-200 CE
Hopewell Culture Mississippi & Illinois valleys 200 BCE-700 CE
Mississippian Culture Much of east North America 700 CE
They had a complex and organized way of life. Some of their villages expanded into cities.
“Aldena Indians buried objects with their leaders, just as the ancient Egyptians buried objects with their pharaohs under the great pyramids…a wide range of stone, wood, bone, and copper tools; pottery; cloth woven form plant fibers; bone masks; stone pipes; stone tables, often with bird designs; ornaments made from a mineral called mica; pearl beads; and stone and copper gorgets (worn over the throat).”
Adena stone pipe.
A serpent shaped mount presumed to be from the Adena Mound Builders in present day Ohio…1.348 feet long!