The Minaret Formation is a Late Cambrian limestone formation of the Heritage Group of Antarctica. The age of the formation is established to be Guzhangian to Cambrian Stage 10 (or Merioneth to Dresbachian in the regional stratigraphy), dated at ranging from 500 to 488 Ma. The formation has provided the first known Late Cambrian archaeocyathid, and Knightoconus antarcticus, an ancestor to the cephalopods.