15 
0 
4 12 220) 2:8) 3:6) 74754 
BOUNDARY ROUGHNESS (CM) 
15 
10 
FREQUENCY 
012345 6 7 8 9 10 
MEAN RPD DEPTH (CM) 
15 
10 
5 
0 1. 23i-46."6" 7256) S810 
ORGANISM-SEDIMENT INDEX 
Figure 3-33. Frequency distributions for boundary roughness, RPD, 
and OSI values for the NLON-85 survey area, January 
1986. 
