22 Table IV. Relative sr 7° content of depth increments collected in 1959 from two Rongelap Atoll soil types. Percent of total in surface ten inches Depth in Old Soil Young Soil 0o-i1 81.0 52.9 1-2 4.9 16.6 2-3 2.8 16.2 3 - 4 2.0 5.8 4-5 1.4 4.0 5 - 6 2.2 2.2 6-7 2.0 1.2 7 - 8 0.8 0.7 8-9 2.5 0.2 9 - 10 0.6 O.1 100.2 99.9 inches Total (Pit 4) (Pit 6) ee»