Figure 10: The relationships of the subdivisions defined by sequence stratigraphy to the main reservoir zones of the upper part of the so-called 'Thamama' in field 'A', offshore Abu Dhabi, according to the several groups of authors (modified from et alii, 2003). *: the Orbitolinid-rich layer and above; **: missing section in the southern part of Bu Hasa field;***: below the Orbitolinid-rich layer.