100 

 90 

 80 



o 



(X> 



I 60- 



e 



I 50- 



40- 



30 



20 



10 







. ? 



'°'000. 



/S6fc 



7 00' 



,o^^r' 



,e<^ 



STAGE ISLAND 

 POND 



8 7 6 5 4 3 2 



GEOPHONE NUMBER, 30-foot spacing 



REFUGE ROAD 



PID DRILL HOLE 



Figure 20. Time-Distance Plot for PI-17 Shows the Time Step Probably 

 Related to Buried Peat. In addition, till was found in 

 drill hole PID, and was located on the adjoining seismic 

 profiles. Till was calculated at a depth of 75 to 80 feet 

 on the transverse profiles; profiles running parallel to 

 the beach located till at 90 feet. 



3 I 



