DRAFT =. veightng from 0.05 to 30 gns., which contained no iocse mud or sandon the surface, also shoved considereble activity (C+1, C8, C-10). active (C~1, C6, Smail coral bits were only slightly radio~ C-7, C-9, €-12). The most active sample con-~ sisted of fine sand and globigerina ooze found at 1460 meters depth at core C-10A. The coarser sand was found te eit &,200 cpm/g whereas the ooze emitted 29,500 samme rays per minute ver grem. A gamma energy spectrum showed tne presence of Zine-65 and one othsr gauve-enitting isotope which hag not been identified. This sample ves fovnd in the erea wasre the sea water at 1000 meters showed a high vwoek of radloactivity. thusly removed as well as the filtered water wes ccunted. cr The suspended sedim k be through a 0.5 wicron Millipore filter. eb ote _ The water trapped cver theton surfece of the core was 22 @ “4 £4) Qu A cross section of core C-~+ is illustrated in Figure 3. The core which consisted essentisily of celcareous gichijerina sections. The outer perifphery of the core was cut evay and aisearded to reduce contamination which may have been trans. ‘ferred from siice to slice by the barrel of the core es it penetrated the botton. The slices were assayed, giving the results shown on the core slices in Figure 3. The activity of the core is highest in the top 3mm layer, and then decreases to the 18mm depth where a sharp increase occurs. This peek then diminishes at a rate similar to the surface peak. At the bottom of this 4€ cm core only a 3.3 epn/g trace of NAN wy s wt ne activity is found, which closely agrees with the values ° AS 2