الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
During this work the distribution of different planktonic
and benthonic larger foraminifera and ostracoda OOAtained
in the Oligocene section have been studied on fo~r
wells in the Northern Hestern Desert. Egypt. Abu Tunis
lIo. IX. East Faghur No. I, Khalda No.1, and North Ghazalat
no. 1.
The Oligocene sediments in the stUdied wells are oharaoterised
bl an upper unit (reefal limestone) equivalent
to the shoaahan Formo.t10’o’ of Auda and Omara, 1972, wnich
is rich with benthonic larger foraminiferal assemblages I
Jl.~<L~c..lc~lJ;l’l;.”eW.~.. 1l!,o&J! gsiAo\des comJ!-l*:Jt~’:l’~,.30HLtj’1ZLlJ,’”:::G~¥r’1
in East Faghur well No.1. The lower unit is oomposed
mainly of calcareous shale and is known as Alam El Bueib
Formation (Marzouk 1910); this unit is rich with planktonic
foraminifera.
Aocording to benthonic larger f~aminifera the follov.-
ing hiozones are identified and disoussed in details I
- M!.9U.2E!.i;.qo~isd c~OJI1eloanatq.V!;e.R-id ocz,ol,!AA .w Zone of
Upper Oligocene time (Chattian). It is well repras9Ated
in Khalda well No.1.
- ~eJ2iA~c,v:cli.na.und.~~,Z,\Olle (Upper Oligooene). It 18
identified in North Ghazalat well No.1. _ Nummulites interID2dius Zone. This zone is recorded in
•.•• _., ••••••••••••••....•••....•.....•.. ....-_ ••• rt=1
this work for the first time in Egypt in the Oligocene
section of E2St Faghur well No.1, and cur~es based on
different measurement s oarried on th.e~l.u*it;sba~e
been prepared.
By using planktonio these ~OAes are recgonised trom
top to bottom 1-
_ .~J..ob•oo.~r]J.2. oj.?1.ml! o;ei.m;.qZone I It is dated as Lowar to
Middle Oligooene time. This zone is the predominant
Oligocene biozone allover the No~thern Western Desert.
• ~~~1~~~~~ am~~~apertpr~ Zone 1 This zone was propose~
for the first ttme by El-Sheikh, 1975· in Dabaa wall No.1,
Nortnern Western Desert.
.• .~s.s).gei,.rlt~l§.9Jl.i.,p..qlensiE1l ,Q.seud oha..§ig.tq~inl\ ~qra Zone I
This zone is recorded here for the first time in the
early Oligooene seotion in the Northern Westerh Desert.
Ba.aed on Ostraooda tne onll identified Oligooene biozone
1s I
_ ~~~Clp~~~e.~qp~Zone equlvaleA’ to the plankton10
~qborotal~ ~~A o~~ Zone. and it is identified in
Khalda 1 and N. Ghazalat 1.
The zone of ~Aaoqyle~~i~ ~od.osU§ ~.o~uA which 1s mentloAed
lA the text in East Fagtutr well No. lt is obarao-
”e~lstic for Middle Eocene time and proved to have an unconformabls relationship with the Oligocene sediments
~n this well. While in the other st~died wells (Khalda
and North Ghazalat) a conformable relationship betwae.l1
Upper Eocene a,.nd Oligooene bas been .not ioed. In Abu
Tunis well No. IX t he Oligocene is unoonformably dapesi~
ed on the Middle Eooene.
The Upper Eooene-Lower Oligocene boundary is taken ehronologically
at the first appearanoe of the species
9~~sijte~j~~~ ~~ipolensi~.
The Upper Oligooene-Lower Miocene boundary is delineated
at the disappearanoe of the species ~~glP~in~ifl~~ oomplanatus
(which is restricted in the Oligocene) and tne
•• tn
first appearanoe of G.l.obls.e~inoi;d..~e Jmll.
Among this work different subsurface maps (Isopach &
Facies and structure) for tae Oligooene section have
been done.
In this study 3G,planktonic foraminiferal speoies, 10
benthonic la~ger foraminiferal species and 20 ostracoda
species have been studied in details and illustrated in
(8) plates.