oa Biofacies and Palaeoenvironments of the Mishrif Formation in Saudi Arabia

The Mishrif is the youngest Formation of the Wasia Group, dated on planktonic and benthic foraminiferal evidence as Late Cenomanian, and is encountered only in the subsurface of Saudi Arabia. Three biofacies are evident and have been used to subdivide the formation into four carbonate depositional cycles, of which the shallowest beds are sufficiently porous to provide intra-formational reservoirs.