. Collected reprints / Atlantic Oceanographic and Meteorological Laboratories [and] Pacific Oceanographic Laboratories. Oceanography New York-Neiv Jersey shelf 79 ^^ 40* 35' ^////////7»;^ 7y2S. 73»2I' (xS3>IO iii [m P^ ^< â¢GRAB SAMPLE â BOX CORE Fig. 11. Distribution of grain sizes over the Tobay Beach ridges, LINS area. Size classes in phi units. taken from Fig. 12, obscures the brief time- scale flow associated with the storm. The 3-h low-pass record, which is only slightly .smoothed and still contains the tidal signal, shows a period of offsho
. Collected reprints / Atlantic Oceanographic and Meteorological Laboratories [and] Pacific Oceanographic Laboratories. Oceanography New York-Neiv Jersey shelf 79 ^^ 40* 35' ^////////7»;^ 7y2S. 73»2I' (xS3>IO iii [m P^ ^< â¢GRAB SAMPLE â BOX CORE Fig. 11. Distribution of grain sizes over the Tobay Beach ridges, LINS area. Size classes in phi units. taken from Fig. 12, obscures the brief time- scale flow associated with the storm. The 3-h low-pass record, which is only slightly .smoothed and still contains the tidal signal, shows a period of offshore flow more clearly. These results must be viewed cau- tiously. The Aandaraa current meters which were used have large direction and speed errors when used in shallow water with sur- face wave amplitudes as large as were pres- ent during the event described here. During the November-December exper- iment on the Long Island inner shelf, esti- mates of sand transport were made from calculations from current meter records (Lavelle et al. in press) and also from radio- isotope tracer dispersal patterns (Lavelle et al. unpublished data). To generate the pat- terns, about 500 cm^ of indigenous fine to very fine sand was surface-coated with 10 Ci of »«3Ru (half-life, d). On 12 No- vember, equal portions of tagged sand were released in water soluble bags at three points at the east end of the main trough (Fig. 14). The injection points formed an equilateral triangle with sides roughly 100 m long. The developing dispersal pattern of labeled sand was surveyed at intervals by scintillation detectors mounted in a cylinder towed across the bottom. Navigation was by a Raydist system with 10-m resolution. Four postinjection surveys were made dur- ing the 11-week tracer experiment. Disper- sal patterns mapped 2 and 8 weeks after in- jection are shown in Fig. 14. After 2 weeks (25 November) roughly ellipsoidal smears trended east from each of the three injection points (Fig.
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