12. region of Kabelle Island in late 1954 and from 1956 to 1957. Tre «unusual pattern near Kabelle Island is undoubtedly assocdate! witn its geograpnical location. commer of the atoll, Isolated in the northeastern it is so located that unless fallout occurs directly there, a long time may be required for activity to drift there bo: lagoon currents. Kib>lie Island, Although fallout in March 1954 did hit the adjacent lagoon area may have been temporarily refveshed by relatively uncontaminated ocean water entering from she inter-isiand channels at the time plankton was first sampled near Kahellie in July 1954. ‘Then, by December 1954 an influx of contaminated lagoon water could have occurred near Kabelle. The rise from 1956 to 1957. probably resulted from a similar influx near Kabelle Island of contaminated lagoon water, since in tais cuse it is fairly certain from data on terrestrial sampling, that the 1956 fallout did not @ffect Kabelle Island as much as it did the more southern islands. Because of its isolated location this northeast bay of the lagoon may be expected to.vary in the radlLoactivity of its plankton. Figure 3 snows, on log-log plot, | the decay patterns of six Ordinal Samples counted on more than three occasions. Ordinal values apply only to eich curve separately, and do not permit comparison of absolute racitoactivity between curves. as March 1, The date of reference is taken 1354 because the detonation of this date is believed to nave contributed many times as much radioactivity to the atoll as ”*{ARCHIVESYor = ep ee atia