Cores were set up for splitting in a wooden trough. A circular powersaw 

 mounted on a base which is designed to ride along the top of the trough was 

 set to cut just through the liner. By making a cut in one direction and then 

 reversing the saw base and making a second cut in the opposite direction, a 

 120° segment of the liner was cut. The sediment above the cut line was then 

 removed with a spatula, the core logged, sampled, and photographed. 



Samples from cores were examined under a binocular microscope, and de- 

 scribed in terms of gross lithology, mineralogy, and the type and abundance of 

 skeletal fragments of organisms. Petrographic analysis through transmitted- 

 light microscopy was performed on certain core samples that coincided with 

 prominent acoustic reflectors to further delineate their nature and origin of 

 associated sediments. 



Data processing included analysis of all seismic reflection records and 

 reduction to line profile drawings. Cores were logged and sampled to provide 

 sediment representative of each sediment facies penetrated. The samples were 

 visually described and size analysis was made by means of a fall velocity-type 

 rapid sediment analyzer. The positions of cores and seismic reflection pro- 

 file lines were also plotted at a scale of 1:80,000. 



3. Scope . 



This study concentrates on the geologic character of the subbottom and 

 sediment distribution over most of Long Island Sound which covers nearly 3,400 

 square kilometers of the region between Connecticut and Long Island, New York 

 (Fig. 1). The study area extends from Fishers Island (72°00' W.) on the east 

 to near the East River (73°45' W. ) on the west, close to New York City. 

 Because of the nature of this study, area emphasis is on the nearshore parts 

 of the Sound along the shores of Connecticut and northern Long Island in water 

 depths from 3 to 30 meters; the central parts of the Sound at the eastern and 

 western ends are also covered in some detail. 



Figure 1. Regional map of Long Island Sound showing its relation to 

 the Piedmont province of Connecticut and Atlantic Coastal 

 Plain province of Long Island. 



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