Inlet (73°45'W.) east to Montauk Point (71°50'W.), and includes parts 

 of Gardiners Bay and Block Island Sound on the eastern end o£ Long 

 Island (Fig. 2). Actual data coverage extends a maximum of about 10 

 nautical miles (18.5 kilometers) offshore; however, by extrapolation, 

 shelf areas seaward are included in the discussion of shelf morphology 

 and sediment origin. Collection of field data for this study was con- 

 ducted during the summer of 1968 under contract with Alpine Geophysical 

 Associates, Incorporated. Data collected consist of approximately 735 

 statute miles (1,183 kilometers) of high- resolution continuous seismic 

 reflection profiles and 70 vibratory sediment cores with a maximum length 

 of 20 feet (6 meters) and a mean length of 9.7 feet (3 meters). Core and 

 geophysical trackline locations are shown in Figure 2; core descriptions 

 are in Appendix A. CERC data coverage for individual areas includes : 



(a) Gardiners Bay : 85 statute miles (137 kilometers) of 

 geophysical records; 14 cores with average length of 12 feet 

 (3.6 meters) . 



(b) Montauk Point : 152 miles (245 kilometers) of records; 

 20 cores with average length of 8.5 feet (2.6 meters). 



(c) Shinnecock, Moriches Bay, and Jones Beach : 296 miles 

 (476 kilometers) of records; 24 cores with average length of 



11 feet (3.4 meters). 



(d) Fire Island : 173 miles (278 kilometers) of records; 



12 cores with average length of 8 feet (2.5 meters). 



(e) Long Beach : 29 miles (46.7 kilometers) of records; 

 no cores . 



Additional data available for inclusion in this study (data location 

 plotted in Fig. 2) include: 



(a) Approximately 225 miles (362 kilometers) of geophysical 

 records and descriptive logs from 19 vibratory cores off Nassau 

 County from Alpine Geophysical Associates, Incorporated after 

 the conclusion of a preliminary regional study for site selection 

 of an offshore sewer outfall; 



(b) logs for two 20-foot soil borings taken on the shelf 

 south of Atlantic and Long Beaches from a technical report by 

 Sieck (1965); 



(c) a descriptive log and sample photos of a 240- foot 

 (73.2 meters) boring at Orient Point, Long Island, from a tech- 

 nical report by Woodward-Clyde-Sherard and Associates (1965); 



(d) descriptive logs for 15 cores along a 2.5-mile 



(4 kilometers) offshore transect at a Tobay Beach sewer out- 

 fall position from Testing Service Corporation (1969); and 



12 



