Palynological, palynofacies, paleoenvironmental and organic geochemical studies on the Upper Cretaceous succession of the GPTSW-7 well, North Western Desert, Egypt

Palynostratigraphy and paleoenvironmental significance of the Cretaceous succession in the Gebel Rissu-1 well, north Western Desert, Egypt

“…Age assessment: C. brasiliensis does not range above the Late Cenomanian as reported from other areas (El Beialy et al, 2010a). In North Africa, Early to Middle Cenomanian sporomorph assemblages are characterized by the first occurrence of C. brasiliensis (Thusu and Van der Eem, 1985;Lawal and Moullade, 1986;Schrank and Ibrahim, 1995;Mahmoud, 1998) which replaces the smaller Classopollis pollen.…”

“…legouxae is also an index fossil in the Late Albian-Early Cenomanian strata of Brazil (Herngreen, 1975) and was reported in the same interval in Senegal and Gabon (Jardiné, 1967;Boltenhagen, 1980). It also showed a similar age in the north Western Desert (Sultan, 1987;El Beialy, 1994c;Ibrahim, 1996;El Beialy et al, 2010a).…”

“…These studies were initiated by the work of Urban et al (1976) followed by a series of papers listed in El Beialy et al (2008Beialy et al ( , 2010a and Zobaa et al (2008). El Beialy et al (2008) investigated the Bahariya Formation from the GPTSW-7 well to throw light on the palynostratigraphy, palynofacies and source rock evaluation.…”

“…Zobaa et al (2008) studied the kerogen and palynomorphs contents in the Bahariya Formation and Abu Roash ''G'' Member sediments in the Razzak 7 well, north Western Desert, Egypt, to examine the changes in their organic components and use them to interpret paleoenvironmental conditions and biostratigraphy. El Beialy et al (2010a) studied the subsurface Cretaceous of the Abu Roash and Bahariya formations in well GPTSW-7, based on the palynological analyses of 71 cuttings samples, of which 24 have also been analyzed for geochemistry, in addition to three sidewall cores analyzed for vitrinite reflectance (R o ). They also recognized four palynological zones and three subzones in addition to a poorly fossiliferous interval ranging in age from Coniacian-Santonian to Early Cenomanian.…”

Palynology of Aptian and upper Albian (Lower Cretaceous) amber-bearing outcrops of the southern margin of the Basque-Cantabrian basin (northern Spain)

“…10Z). El-Beialy et al (2010) considered N. triangulus to be a Cenomanian marker in West Africa also appearing in the lower Cenomanian of Egypt. However, this species is relatively widespread further north and its occurrence is recorded from the late Albian onwards (Singh, 1983 and references therein).…”