96 



THE OCEAN FLOOR 



homogeneous, fine-grained, deep-sea clay. In the lower 

 part several layers of sand were found which mineral- 

 ogical examination showed to be not mafic but of con- 



Depfh in 

 centimeters 

 beloui pediment 

 ^surface 



NrJS9 



/^/6ofrosj-Sfat/on 

 /Vr:J60 



1 



M 



1 



£n/. Dr /TLoc/yer 



70C 



I — I iimeofredclaij 

 Qm] red clay 

 ^ blueclo^ 



Fig. 34. Stratified cores from 

 the equatorial Atlantic 



tinental origin, that is, derived from a coastal shelf of 

 some continent or large island. Most surprising of all, 

 in the lowest stratum of this sand were found vegetable 

 remains — twigs, nuts, and bark fragments of dicotyle- 



