FORAMINIFERA FROM BOTfOM SEDIMENTS OF LAKE MARYUT AND LAKE MANZALAH, EGYPT

FORAMINIFERA FROM BOTfOM SEDIMENTS OF LAKE

MARYUT AND LAKE MANZALAH, EGYPT

By
SUD K. EL-WAKEEL
Oceanography Department
Alexandria University
HOSNl F, ABDOU
Geology Department
AZe:x:andria University
AND
SUD D. WAHBY
Alexandria Institute

of Oceanography and Fisheries

MATERIAL AND METHOD OF STUDY
Sediments were collected from the bottom of the two lakes using a Pet~rsen
grab sampler from 32 positions in Lake Maryut (Fig. 1) and 46 in Lake Manzalah
(Fig. 2), covering the whole area of the two lakes. Samples were subjected to
mechanical analysis following the IOutire technique ofKrurnbein and Pettijohn
(1938). Six fractions resulting from t’he mechanical analysis were chosen,
namely> 2, 2 -1,1 -!,! -1,1-1 and 1- ~6 nun. The first three fractions
proved to be devoid of foraminifera, whereas the other three fractions were
examiLed microscopically. Each sample was usually sprayed many times on a
squared slide in order to find out the approximate frequer~cy of the different foraminiferal genera. From t,he study of the hydrography and chemistry of Lake
Maryut (Wahby; 1961) and that ofLake Manzalah (EI-Wakeel and Wahby, 1969b)
it was fourd that each lake is identified ecologically into zor.es. Accorwrgly,
it was found reasonable to examine the foraminifera of each zone sepalately and
then correlation is established between the different zones in Older to thIOw light
on t,lle effect of the ecological factors on the foraminifera of each lake.