MID- ATLANTIC RISE 



AFRICA 



Fig. 10.13. Crustal structure across North Atlantic. After Heezen ef al., 1959, with minor changes taken 

 from new section furnished by Tharp and Heezen. 



KILOMETERS 



Fig. 10.14. Crustal structure sections C-C and E-E' of Fig. 10.6. After Hersey et al., 1959. Numbers are 

 velocities per second of the various layers. Stippled layers are interpreted as unconsolidated and con- 

 solidated sediments. 



