1AWHL$HPHjLT$ EJE+EBAEHU HHHHT$0LT$ 8LT$ AzArAIW LT$@HLLAG(LT$@AWE1Aw 1LLEl LT$0H$AAG|$<A0  AwfDHD$HH4,x1Mn/AtE(D$0IAdEAAD(DC4DAH@E$Dd$(fDHT$ qT$ HP EAAH -H5H={gfffff.HHщH ffff.H\$Hl$HLd$Ll$ALt$L|$HA@AՅuAHH$H\$xL$L$L$L$HĨbDH!3H|$hAHjH{H-F4 HD$hHxkjIċCH|$hot&HC8HS0I$0Ht$hHHH|$hHK8Ht$PfD$PfD$RW GHD$XfT$THS0fD$VAHC(H{AHt$hDDHD$HC H$dc@DK@EH{0jH{8aH{HsHA|$H +Hd)1PkfDHK8HS0LHt$hSHC81T$,HS(HD$@HT$0HS HT$8HT$hHT$ HSH|$ HT$HHHD$D$(t HVD$(XgHI[HT$ A|$L@+H 'ABHT$HAGL<$IWHT$8AHD$IW HT$0IG1IW(T$,AWmHT$@HBHHzHT$*hH(HT$@tH\!DXEDPEHR Hc1HHtH` L$(LL|jHC8Hs0H|$hHVL@HHHHDH{Ht$hADDjHC8Hs0H|$hHVL@HHHHAgHKmH0\H l)H5H={cY{ffffff.USHH2iH{H5)H=&&H!3AHHgH$HxfHH(Ht$x@~RubLD$H4ׂCLHHCHLHHHcQHfHl$Ld$ILl$Lt$HL|$H\$HH~HT$8ILD$dIH(HHD$ H!T$8HIXcHH50"ELcCC@Ls0" 0"HID$PHHT$ALLl$(LkHHT$HLjHSHL(HCP衣LD$@Ht$@D$DD$@HD$ x@_k\8jAH$H1eH{LH[fDT$8E11HLfH\$hHl$pLd$xL$L$L$HĘT$DLT$4L$4H|$(H;T$8)LD$@ LD$@HD$8D$D$D蓢T$Ht$@H\$H)HD$ T$Dx@^Dl$DLDkYHALDkGcf."'IT$PHH$fII~HT$8LD$HL$(AHT$8HމljSoHLbAHM"1dH Zt@H;T$8HT$8LHT$L$D$@HT$ L$D$@L$H1Ht$()H9T$L$DwL$(L$DLL$>HT$ L$Ht$@H\$Hz@)L$Dm]uH #H5H={]fff.H\$Ld$HLl$Lt$IL|$Hl$HXHI`H߾IL(HHHaH1H}0u)Hl$0H\$(Ld$8Ll$@Lt$HL|$PHX@A@Ht$rLH}0HcuGeology Department, Faculty of Science

Cairo University

yasser@sci.cu.edu.eg

Tel. +2 01092782790 Dr. Motaz M. Adel

Geology Department, Faculty of Science

Cairo University

motazadel80@hotmail.com

Tel. +2 01115536539

Geology Department, Faculty of Science, Cairo University, Giza, Egypt

Tel. 0020 35676864 0020 35676850