Figure 17: A set of 4 core slabs illustrating the Habshan - Bu Haseer boundary, well N° IFI of field 'X', offshore Abu Dhabi. Slab A: vermicular mudstone of the Habshan; slabs B and C: lag deposit, which forms the extreme base of the Bu Haseer unit, with characteristic pebbles and cobbles; slab D: fossiliferous wackestone.