STRATIGRAPHY OF THE DEEP-SEA FLOOR 



69 



and other environmental factors, as shown by WylHe et al. (1956). 

 The same authors (1956, p. 65) plotted an experimental average 

 curve of porosity against velocity for limestone. The curve, repre- 

 senting, of course, an elongate area of data spread, is valid under 

 differing conditions in laboratory and field, including oil wells 

 where the estimated velocity from the porosity data compares 

 favorably with the velocity as determined by the new, continuous- 

 velocity logging technique. 



In Fig. 7 note the positions of the fi\'e samples of deep-sea lime- 



LITHIFIED GLOBIGERINA • 



OOZE 



SUTTON et al., 1957 : 



HIGH VEL, GLOB OOZE • 



GLOBIGERINA OOZE » 



SAMPLE 4 , 



EXPERIMENTAL CURVE 



WYLLIE er Ql.. 1956 



LAUGHTON, 1957 

 :l , 1956 



SHUMWAY, I 956 



80 70 60 50 40 30 



POROSITY, % 



Fig. 7. Porosit}- vs. \elocity of the elastic compressional wave in various sedi- 

 ments and rocks. 



