io? > F 5b L a 2 = = ~ Sk o y UL E 2Fr = ES 2 = a,=H L aT] = er 4 MUSCLE DIGESTIVE GLAND BEACH SAND BOTTOM SAND 1 = — 4 b [Bies “ ER EK® | S41 z 7 |e R 1 ; 4 8 Ww a : Sj z es of = 1wW 0° CF S GILL MANTLE —— a 1OF =e ef HE a i 4 - i. + ~[ r * Rd IGURIN 19. RIGIL! 14 BOGALLUA 3 : ENGEBI 3 ETT : if 4 a 4 4 i 4 4 AARAANBIRU 9 NAUTICAL MILES FROM GROUND ZERO eg RUNIT 12 Fig. 4.1——Relative radioactivity of soil or beach sand. Bottom sand taken from sea-cucumber guts and giant-clam gill, mantle, muscle, and digestive gland. The relative activity of each type of sample at Igurin is taken as 1. UNCLASSIFIED