qoo0000 ~4q—q= 100000 rtm DOO Ne Dx ts Dz Is ti z 8 tof 72 a [0 wt ‘og 18 ella 100 5 | W vx vu bb MI C 10 =~ = I 20 40 60 tty) 80 LOO 120 140 160 180 200 MEV "Pig. 1. Gamma-ray spectrum of sediment from Bravo Crater collected at a water depth of 160 feet, August, 1969. Dh