21 



While the resolution of the plan view photographs did not allow differentiation between 

 fine sands and silts, sediments containing pebbles, cobble, and rocks were clearly evident. 

 The plan view photos revealed two rocky areas, one at transect CI and the other at C4 

 (Figure 3-11, A and B). The larger rocks at both of these sites were covered with silt and 

 encrusting bryozoans. Many of the rocks observed had sharp angular edges and were 

 probably disposed construction debris. 



Plan view photographs also provided information on the small scale horizontal 

 distribution of the benthic community. In the plan view photos, both sedentary infaunal 

 polychaete tubes and epibenthic species were observed. Infaunal tubes were present at all 

 six transects. Tube distribution was patchy and ranged from dense mats (Figure 3-12, A) 

 that carpeted the bottom to absence (Figure 3-12, B). Epifauna observed at BLDS 

 included mud anemones, seastars, hydroids, gastropods, and bryozoans. 



Monitoring Cruise at the Historic Boston Lightship Disposal Site, August 1994 



