Marking on the exteriors of ceramic jars made using a kerneless corn cob has been recognized for several decades in Georgia. It has also been clear that this mode of "decoration" only occurs during the Middle Mississippian Savannah period. The type name has never before been formally defined until now.
Cob marking on sand / grit-tempered excurvate rim jars. The location of the marking is almost always just below the rim, and some people believe the cob was used to help form the excurva te rim as a molding tool. The rims are usually simple or rolled. Sometimes the cob marking extends some distance down the side of the jar below the neck of the jar.