الفهرس 
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Abstract
Three stratigraphic sections in west central Sinai, including South Abu Zenima, Wadi Matulla and West Wadi Matulla sections, have been measured, sampled and examined In the study area, the succession overlying the Campanian–Maastrichtian Sudr Chalk and
underlying the Lower Eocene Thebes Formation can be subdivided into three mappable
units. They are, from oldest to youngest: the Dakhla Shale, Tarawan Chalk and Esna
Shale. Petrographically, the carbonates and shale are the principal lithofacies. Three
different microfacies are defined. They are: planktonic foraminferal packstone,
planktonic foraminiferal wackestone and mudstones. Based on the stratigraphic
distribution of the calcareous nannofossil species within the studied Upper Paleocene–
lower Eocene rocks, the following biozones are defined: Discoaster mohleri (NP 7/8),
Fasciculithus alanii (NP 9a), Discoaster araneus (NP 9b) and Tribrachiatus contortus
(NP 10a). The Zone NP 7/8 spans the studied topmost part of Dakhla Shale. The Subzone
NP9a spans the Tarawan Chalk and the basal part of Esna Shale. The Paleocene/Eocene
(P/E) boundary passes through the lowermost part of Esna Shale.