ABSTRACT: Biostratigraphic studies of planktonic foraminifera on the Dababiya Quarry corehole suggest an eight-fold zonal subdivision of the lower (Dakhla Shale,Danian) and middle (uppermost Dakhla and Tarawan Chalk) Paleocene. Preliminary studies of the basal part of the hole (~137–140 m) and the uppermost Cretaceous (~80–81 m) indicate the presence of the lower Maastrichtian Globotruncana aegyptiaca and upper Maastrichtian Pseudoguembina palpebra Zones, respectively. It would appear that there is a short hiatus at the Cretaceous/Paleocene boundary (denoted by the P. palpebra/Parvulorugoglobigerina eugubina zonal boundary and apparent absence of the (uppermost Maastrichtian) Pseudoguembelina hantkeninoides Zone and the (basal Danian) Guembelitria cretacea (P0) Zone, which may be due to syn-sedimentary tectonic and/or inadequate sampling density. The Danian/Selandian (D/S) boundary is placed at the boundary between the Igorina albeari/Praemurica carinata (=lower part of Zone P3b) Zone and the Ig. albeari (=upper part of Zone P3b) Zone at a distinct phosphatic bed tentatively correlated with the Qreiya Bed (in the Qreiya section) and the “Neo-Duwi Event” at 44.5m. This bed is marked by the gradual disappearance of praemuricid taxa in general and the lowest occurrence of P. carinata in particular.


You are not registered as a current subscriber. If your institution has an active subscription, contact us to ask for help with your computer's IP address. If you have an active personal subscription, log in.

Subscribe to Stratigraphy

Online only Added print
Institutions $280 $340
Individuals $140 $200