| Petaga Point | White Oak | Border Lakes |
White Oak, considered as an aspect of the Old Copper phase, also dates well into the Woodland Pattern. This aspect is represented by the North Central Foci in the Leech, Red and Bowstring Lakes area and generally exhibits Sandy Lake, Blackduck, net-impressed, horizontally-corded, and smooth categories pottery. The evidence at the White Oak Village site supported the view that the Sandy Lake ware is the most recent, Blackduck is intermediate, and Brainerd ware is the oldest.
Lugenbeal, Edward. Brainerd Ware Occurrence and chronological Relationships, Some Studies of Minnesota Prehistoric Ceramics: Papers presented at the first council for Minnesota Archeology Symposium-1976. Edited by a Alan R. Woolworth and Mark A. Hall. 1978.