The Mauddud member consists of a predominantly carbonate section with subordinate terrigenous intervals. Its age is esentially late Albian, except for its uppermost part, which at least, in Dorra field, is possibly early Cenomanian.
The sedimentation of the Mauddud member is the result of a regional transgression which developed from the northeast to the southwest and did not take place contemporaneously all over the studied area.
The Maudded transgression took place in three main phase. A first phase is recognizable in only the eastern and north-eastern part of the reviewed area, Dorra field. A second phase extended more largely southward, reaching Hout field. A third, final phase extended all over the reviewed area.
The Mauddud transgression ended up with the sedimentation of the Wara member, which brought back terrigenous facies all over the studied area.