Show r GULF L 1 t t tI tN N r wee y I str a E Ex Experts x p per e r t s with explosives right handle cans of dyna dyna- mite with smiling aplomb as they prepare a charge to be exploded in a shot hole drilled from a special barge Force of the explosion is controlled by bythe bythe bythe the number of cans fitted to together to to- gether A AL i N 1 i f J t I f L f J m I y H t Y X r. r 7 X y t z t t ty f fi i 1 P tJ t r R RJ J H t i j. j y I k rii j i l v fi 4 e ef v NHi y f a s fe- fe tl t W r lx 1 h JJ y of t y r J I i I J JI 5 I A veteran of many underwater underwater under- under water voter explosions the grizzled explosives expert t at right is connecting t the h e detonating switch just prior to the seismic explosion which will cause a miniature miniature man made earthquake earth earth- quake 9 In the constant search for more oil for Americans Ameri Amen cans who are using 40 per cent more than ever before engineers hay have h a v e pushed out Into the Gulf of Mexico Working from boats the crews explode small dynamite charges beneath the surface pick pick- pickIng ing up resulting shock waves on seismometers Interpretation of seismograph seismograph graph records shows the geological formations un under un der the sea seD bottom indicating indi cating eating whether or not conditions are ore favorable to the accumulation of oil The crew left is marking position for a an a T hi s 's At left a Shell Oil company crew lowers a long length of dynamite cans into the casing which lines the foot 80 deep hole Its It's a difficult task from a wave-tossed wave boat Notice worn w worn rn by crew 5 S I 1 Sim M I h w s al a I 1 r y yO r w r f 6 0 There she goes and a geyser of water right shoots feet is detonated into the air as the suspended charge e ed l sending shock waves to be picked up by the string of seismometers Base tt r r ri i e S 4 tj i. i S 6 Waiting for the order to fire the shooting crew left watches for possible drift from the toy balloon which marks the location loca location location tion of a suspended charge d l e a aSS aSS' SS' SS SS'S S 55 SS 5 S S 5 S S 'S r y o 0 Exp Experts left interpret seismometer seis seis- recordings of the shock waves Interpreted by experts these records give an on amazingly amazing accurate picture of subsurface conformation j 14 S 'S S S'S |