Courtesy Sheffield Site Facebook pageThe Oneota and the Woodland traditions have different pottery and different ways of making pottery. The Oneota used ground up shells as a tempering agent, allowing them to make pots that were thinner than the Woodland pottery. Tempering is adding ingredients to clay to reduce the likelihood of cracking when the clay is fired. The Woodland tradition had thicker pots because the tempering agents they used (rocks and stones, known as grit tempering) did not allow for thinner walls; the pots would break when they were fired if they had thin walls and grit temper.
Another distinctive sign that the pottery belonged to the Oneota tradition was the decorations on the shoulders (just below the thinner part) of the pot. Oneota decorations were usually star-shaped.
Written by Bilir and Elias