1-4 







1-5 







1-6 







1-7 







Table C-1. Offshore samples, Duck, North Carolina, 7-9 August 1979. 



Sample Range Distance Depth Eate Time Description 



No. (m) (m) (m) 



I-l 35 N. 3341 15.8 7 12:44 At Waverider — very fine sand bottom with sea- 



like ripples (t«D directions); 

 X = 7 cm 

 a = 1 cm 



< = 20° (estimate) 



1-2 2610 15.2 7 13:12 Clean, very fine sand, ripples (two 



directions) ; 

 X = 10 cm 

 a = 1 cm 



< = 20° (estimate) 



1-3 2085 13.1 7 13:30 Very fine sand, ripples, zero visibility; 



X = 10 cm 

 a = 1 cm 



1838 11.9 7 13:45 Mud and silt bottom, no bedforms, zero 

 visibility. 



550 8.2 8 10.55 Under pier — fine sand and silt, organic debris 

 (muscle shells), no bedforms, zero visibility. 



410 6.4 8 11:07 Under pier — medium sand, oscillation ripples; 

 a =" 2 cm 



350 4.6 8 11:20 Under pier — medium sand, scour holes, straight 

 ripples; 

 X = 8 cm 

 a = 4 cm 

 K = 45° 



1-8 250 4.6 8 11:27 Under pier — medium sand, broken sinuous 



ripples; 

 X = 6 cm 

 a = 3 cm 



1-9 210 1.2 8 11:40 Under pier — medium sand, straight ripples; 



X = 10 cm 



a " 4 cm 



< = 0° (at right angle to pier axis) 



I-IO 1366 10.7 9 14:40 Very fine sand, ripples; 



X =" 9 to 10 cm 

 a = 1.5 cm 

 ic = 5° 



I-ll 1093 8.8 9 14:56 Fine sand, ripples; 



X - 8 cm 

 a " 1.5 cm 



< = 0° 



1-13 640 6.7 9 15:20 Fine sand, ripples; 



X = 6 cm 

 a =■ 10 cm 



< = 355° 



II-l 76 N. 2090 14.6 7 16:51 Fine sand and silt bottom, oscillation 



ripples ; 

 X = 6 cm 

 a = 2 cm 



II-2 76 N. 1890 12.8 7 17:06 Silt on fine sand, oscillation ripples; 



X = 6 cm 

 a = 2 cm 



II-3 76 N. 1647 12.5 7 17:19 Fine sand, sinuous ripples merge with oscilla- 

 tion ripples; 

 X = 8 cm 

 a = 2 cm 



93 



