a ok bs - < vot Th nett a ee =. in 1o00000 100000 KEUFFEL & ESSER CO. 100 OE SEMI-LOGARITHMIC 7 CYCEFS KAO DIVISIONS wantin ula, &, 46 6463 1O00 16 20 ‘Fig. 1. 5002451 40 60 80 100 nent of Enert 120 160 180 200 140 “uigtorian’s Office MEV ARCHIVES Gamma-ray spectrum of sediment from Bravo Crater collected at a water depth of 160 feet, August, 1969. —