162 



WORZEL AND HARRISON 



[chap. 9 



(o) 



KLOMETERS - 

 IP O 2Q2 



PROJECTED DISTANCE 



400 500 



^ ''^''^'^^i^^^ 



VERTICAL EKAGGEHATION 



I0;i 



f'HIilM 



300 



250 



200 



20 



lun/%tt 



1.75 



5 00 2.60 



730 SIS- 

 ASSUMED Sub-M 8 20 3 40 

 ^_J 1 



300 



S200 



(C) 



. 1 1 — >vy*^ 



400 



BOUGUER 



i!3 



500 



600 



=*^^ 



300 



250 



200 



3-10 



3« _2o 



2 _OECS M»SS PCT miT ME* . 



r^ 



''-^AMJ^ 



'f^^ Ai'^^f^f^ 



400 



600 



Fig. 21. Crustal sections computed to fit the seismic and gravity data for the Mid- Atlantic 

 Ridge. (After Talwani, Heezen and Worzel, 1961.) 



