an arc was run on that range until the other range was intersected, at 

 which time an anchored float was used to mark the core location. The 

 jack-up barge was then positioned adjacent to the float for coring. 

 Core sites were located and marked in this matter because of the limited 

 maneuverability of the barge. Without the Voltevt much additional time 

 would have been required to get the barge to the precisely determined 

 core locations. The Vollert located a core position in minutes and 

 dropped a float marker; the barge then immediately moved in on the marker, 

 jacked-up within a few minutes, and the core rig was lifted from the deck 

 and set on the sea floor next to the float. Meanwhile, the Voltert re- 

 trieved the float and proceeded to the next core site. Once on the 

 bottom the coring device was energized, the core barrel was driven into 

 the sea floor, and within about 15 minutes the apparatus was lifted back 

 onto the barge. The core liner containing the sediment was removed from 

 the barrel and small reference samples were obtained from the top and 

 the bottom of each core. The liner was then capped and sealed, labeled, 

 and visually inspected. The jack -up barge was lowered and moved to the 

 next coring location. While underway, the coring device was reassembled 

 and loaded with a new liner for the next core. 



At the end of each working day the jack-up barge was raised above the 

 sea surface. The barge remained at sea for the duration of the survey. 



e. Processing of Data . After completion of both phases of data 

 collection, all the navigational fix marks, ship trackline positions, 

 core sites, and shore stations were plotted to show the coverage within 

 the survey area (Fig. 8]. The seismic records were visually examined and 

 marked to establish the primary geologic features such as regional sedi- 

 mentary reflectors, erosional unconformities, faults, and buried stream 

 channels. Selected acoustic reflectors were then mapped to provide areal 

 continuity of horizons considered significant because of their extent and 

 relationship to the general structure and geology of the study area. 

 Where possible, the topmost reflectors were correlated with cored sedi- 

 ment to provide a measure of continuity between cores. 



The cores were visually inspected and described in general terms 

 aboard the barge; a more detailed study of the cores was made later. 

 All cores were split longitudinally to show changes in sediment compo- 

 sition, texture, and physical character. Selected intervals of cores 

 were color-photographed to provide an archive record of the sediment 

 character and color before oxidation and drying from exposure to air. 

 The sediments were identified, logged, and described according to tex- 

 tural properties, gross lithology, color, strength, thickness, presence 

 of marine organisms, and depth from the sea floor (top of the core) (see 

 App. A). Representative sediment samples from each core were examined 

 with a plane light binocular microscope. Samples of sandy material 

 potentially usable for beach fill were prepared; a total of 84 individual 

 samples were processed and the test of every fifth sample was duplicated 

 as a quality control check. Granulometric parameters (e.g., mean grain 

 size, sorting, cumulative-size distribution) were evaluated by using the 

 CERC Rapid Sediment Analyzer (RSA) as described on page 4-26 of the Shore 



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