ECONOMIC USE 



33 



Divi&ion 1 Nodo&QviaXYl 



Zone I ^(3olv\/maX> I 



Zone 2.. UvicjeYtno. Xy I 



Section 1 Nomon Xv I 





Section 2 lej^tulaviciXy-' 



Zone 5 CGSs>idul>oa. Xy-I 



Zone 1 Frooaicu lavia Xv - 1 



Zone Z Ammobaculitci X>- I 



Zone i 5piTiUin«. Xy-I 



Section !■ Clovtilina. Xy-l 



Zone 2. CTUW.a>Al»r.aXY I 



Zone 1 Pyrgo Xyl 



Divi&iong Diacotb.bXy-l 5e&tion2. Orbu/maXY < ^o^e 2 Lagenc^Xv' 



Idealized Chart of Section Zoned by Foraminifera. 



