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Abstract
The present study deals with the investigation of the depositional evolution of the subsurface Late Cretaceous- Middle Miocene sedimentary sequences of the area south of Matruh in the northern part of the Western Desert.
It could be possible to subdivide the sequence into 5 formations ranging in age from the Late Cretaceous (Campanian) to Tertiary (Middle Miocene). It is noticed that a thickness variation of the formations exist observed. The thickness of the Khoman Formation increase towards the southwestern part of the area, while decreases towards the southeastern part and it changes from 323 m at Nabil-1x to 423.31 m at louly-1. (Fig. 2.5). The thickness of the Apollonia Formation increase in the central part of the area, which ranging from 110.06 m at Louly-1 to 152 m at Hazem-1x (Fig. 2.6). The thickness of the Dabaa Formation increase towards the southwestern part, which ranging from 240.78 m at Hazem-1x to 321.72 m at Louly-1, (Fig. 2.7). The thickness of the Moghra Formation increase towards the western part, which ranging from 307.2 m in Ayman w-1x to 358 m Nabil-1x. (Fig. 2.8). The thickness of the Marmarica Formation increase towards the western part which ranging from 171.28 m at Nabil-1x to 219 m at Hazem-1x. (Fig. 2.9). The lithofacies maps were constructed to trace the facies distributed in the studied area.