GEOGRAPHIC DISTRIBUTION 



To be comparable with other sample sections, and to give a 

 geographic distribution of autocorrelation values of successive 

 measured isotherm depths, the 60-lag and 120 -lag R x values for 

 the shallower isotherm were plotted at a geographic position 

 corresponding to the tow center line (figs. 25A and 25B). These 

 values are contoured with R x values ranging from 0. 3 to 0. 7 for 

 60 lags (30-minute) of the shallower isotherm. The 120 lags (60- 

 minute) of the same isotherm vary from -0.1 to 0.8. Both 

 geographical distributions are similar, but no clearly significant 

 geographic distribution of values exist as in the grouping of slope 

 values. There is, however, a tendency for low values to fall 

 near the southern end of Baja California and extend to the south- 

 east. 



In the corresponding R x for deep isotherms, no definite 

 areas of high and low correlation of the 60 and 120 lags (figs. 26A 

 and 26B) are outstanding. The strikingly low correlation area 

 is caused by only one or two values. 



51 



