A possible stone column base recessed in the carved depression in bedrock just off the western edge of large locus 21 pit. The stone is worn on the top to suggest it was used to support a post (though no beams have been found). Need evidence of additional bases to support notion that this is indeed a column base. A similar shallow depression carved into bedrock coming off of western side of locus 15 pit may also have hosted a similar stone, but no possible to tell if a support stone was ever there.