Twelve calcareous nannofossil biozones of Late Oligocene-Late Miocene in Northern Egypt were defined
and correlated with their corresponding biozones in Egypt
and other parts of the world. These are arranged from the
top to base as Zone NN12, Zone NN11, Zone NN10, Zone
NN8, Zone NN7, Zone NN6 Zone NN5, NN4, Zone NN3,
Zone NN2 Zone NP25 and Zone NP24. In the present study
(Boughaz-1 Well), the Late Miocene unconformably overlies
the Middle Miocene. This unconformity surface is recognized
by the missing of calcareous nannofossil zones NN7 to NN9.
While, in North Sinai (Malha-1 Well), the Early/Middle Miocene boundary cannot be recognized, where the Middle
Miocene unconformably overlies the topmost Oligocene, and
it is defined by the missing calcareous nannofossil zones NN1to NN4. |
