These are considered similar if not synonymous when occurring in lime mudstone or syndepositional dolomite, especially in association with mudcracks and stromatolites. Compaction experiments indicate, however, that in the absence of early cementation, these vugs can be completely obliterated, whereas mudcracks and stromatolites remain relatively unchanged. -from Author
Additional publication details
Birdseyes, fenestrae, shrinkage pores, and loferites: a reevaluation.