Bahariya Formation

Bahariya Formation Stratigraphic range: Early Cenomanian ~100–95 Ma PreЄ Є O S D C P T J K Pg N ↓
Type	Geological formation
Underlies	El Heiz Fm., El Naqb Fm.
Overlies	Basement
Thickness	~100 m (330 ft)
Lithology
Primary	Sandstone
Other	Mudstone, siltstone
Location
Coordinates	Coordinates: 28°24′20″N 28°48′20″E / 28.40556°N 28.80556°E / 28.40556; 28.80556
Region	Western Desert
Country	Egypt
Type section
Named for	Bahariya Oasis
Named by	Said 1962

The Bahariya Formation (also transcribed as Baharija Formation) is a fossil bearing geologic formation dating back to the Early Cenomanian, which outcrops within the Bahariya depression, and is known from oil exploration drilling across much of the Western Desert where it forms an important oil reservoir.

The Bahariya Formation forms the base of the depression, the lower part of the enclosing escarpment and all of the small hills within. The type section for the formation is found at Gebel El-Dist, a hill at the northern end of the Bahariya depression.

Four depositional sequences have been recognised in the Bahariya Formation in the Bahariya depression, separated by three sub-aerial unconformities. The formation was deposited during a period of relative rise in sea level, with each unconformity representing a relative fall in sea level. Each of the individual sequences contains sediments deposited under fluvial, shoreline and shallow marine conditions.

Simoliophis

Indeterminate sauropod remains.

Aegyptosaurus

A. baharijensis

"Partial postcranial skeleton."

Cf. ''Dicraeosaurus

Cf. Dicraeosaurus sp

Paralititan

P. stromeri

"Partial postcranial skeleton."

Bahariasaurus

B. ingens