Figure 16. Selected uncorrected shot gathers from test shots recorded along Line 1 before acquisition of the three seismic profiles. a) Field File number 13 shot with a 2 lb. Pentalite directed charge at 20 ft. depth with a 20 ft. sand-gravel pack fill of the hole. b) Field File number 6 shot with a 2 lb. Pentalite directed charge at 20 ft. depth with cuttings filling the hole. c) Field File number 15 shot with a 2.5 lb. Seisgel conventional charge at 20 ft del)th with cuttings filling the hole. d) Field File number 14 shot with a 5 lb. Seisgel conventional charge at 20 ft depth with cuttings filling the hole.