Full title: Between Casas Grandes and Salado: The Establishment of an Indigenous Borderland in the Late Prehispanic American Southwest/Mexican Northwest
I don't think cloverdale is slipped. I have looked at a lot of cloverdale sherds in SE AZ and the red variety is just made from a red firing clay, I have never seen any that had a slip applied. A slip would cover and hide the indentations.
Could part of the late Southern Mogollon east of the San Pedro and west of the continental divide be related to proto-Opata populations that shifted south after AD 1300, rather than being related to proto-O'otam populations?