STRATIGRAPHY OF THE DEEP-SEA FLOOR 



I :> 



SEA SURFACE 

 WATER 



. . •'•CALCAREOUS '.OOZE' • .•;•*. '. 



I I I 



_|_ LITHIFIED OOZE LIMESTONE 

 I I I 



j-l I I 



T-^~r 



nn 



G^ 



i . I . r 



L-:^^i-i-:^ r^ v-_r 



"^--^ CLAY SHALE 



SEA SURFACE 

 WATER 



RED. CLAY, and; 



.....•: •• .••;•;••.'.•.•.; calcareous ,ooze ;.•..•, 



Fig. 10. Hypothetical sections of the deep-sea floor in the Pacific: (top) assum- 

 ing a change from clay to calcareous ooze deposition which continued to the present 

 time; (bottom) assuming changes in deposition from clay to calcareous ooze and 

 back to clay which continued to the present time; possible lithification of the 

 original materials to shale and limestone is indicated. 



exact boundary between the clay now being deposited and the 

 calcareous material of earlier times. Farther south we know that 

 the upper sediments are unlithified calcareous ooze and that such 

 material has been deposited for some time, as postulated by Shor 

 (1959). In the northeast Pacific red clay area, coring by Scripps 

 Institution has revealed unlithified calcareous ooze at shallow 

 depths beneath the clay. Such a mixture of unlithified calcareous 

 ooze and clay should have been deposited at higher rates than for 



