Abstract
Petrography and powder x-ray diffraction show a technological continuity between Newtown and Fort Ancient pottery in the central Ohio River valley. Both Newtown and Fort Ancient pottery were manufactured from clays derived from Upper Ordovician shale and calcium carbonate temper. The initial use of calcium carbonate temper in the central Ohio River valley co-occurs with the appearance of maize in the Middle Woodland cultural period and may have been inspired by or related to the use of lime for the production of hominy, comparable to the process used ethnohistorically by Algonquian cultures.
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