a aa 4000000 100000 10000 un v c 5 5 UD MEUFPFEL & ESSER CO. WADE TH LSA, 1000 100 Kez SEMI-LOGARITHMIC JF CYCiIFS X AN OIVISIOND " © q 0 w < 10 20 o4 Fig. 1. 40 60 80 100 120 MEV 140 160 180 200 . Gamma-ray spectrum of sediment from Bravo Crater collected at a water depth of 160 feet, August, ent of Energ vey n $ ian’ fSstoria Office ARCHIVES 1969.