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ABSTRACT
The amount and distribution of radioactive material re-
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maining on several atolls and incorporated into plants and
animals of the Marshall Islands was deterrnined two years
after their contamination by fallout from the March l, 1954
nuclear detonation of Operation CASTLE.
,
Readily detectable amounts of radioactive contamination
were found in animals, plants and soil. Most of the activity
in the edible portion of plant specimens was contributed by
cesium-137
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The major radionuclides found in the tissues of fish was
zinc-65, and that in clams, cobalt- 60.
Residual soi] contamination remained confined to the
surface,
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