Coil built, Shell tempered, burnished, pit fired, post fired engraved. Typical 15th century Mississippian Culture pottery. Pre-fired engraved on greenware is much, much easier...happen to have a senior moment at the time! Oh, my pit fire crew is Heidi Boxer and Kelli Stray dog. Heidi is going on 13.
The mussel shells were burnt, then crushed, then added to the river clay.