- k 9 - 



Additional personnel (Cont'd): 



Geophysics t (gravity), C&GS 



Mr. George Keller (sediments);, N00 



Mr. Kelvin S. Rodolfo (sediments ), U. S. C. 



Meteorologist, Weather Bureau 



Meteorologist, Weather Bureau 



Biologist, University of Hawaii 



Biologist, University of Hawaii 



(?) Marine Scientist, Malaysia 



LEG V - CALCUTTA TO COLOMBO 



Leave Calcutta April 28, arrive Colombo May 19. 



Standard underway operations will continue as before, but to them will be 

 added special investigations of the Ganges delta and of the Ganges and 

 Trincomalee submarine canyons. Dr. Robert S, Dietz (C&GS) and Dr. Francis 

 P. Shepard of Scripps will board at Calcutta specifically for these studies. 

 Leaving Calcutta, PIONEER will go directly to the Ganges delta. On two east- 

 west lines across the delta, sediment samples will be taken and electrosonic 

 profiles run in an attempt to compare this delta with the Irrawaddy delta. 

 Where the latter delta seems to be building forward rapidly, the Ganges 

 delta on the other hand, is advancing slowly. Following these sections, the 

 ship will move to the Ganges Canyon at about 21°N, 89°E. By a series of 

 crossings, the canyon will be followed south into the central Bay of Bengal. 

 Sediment cores, dredge samples, electrosonic profiles, bottom photographs, 

 and detailed development of features found by the standard underway measure- 

 ments will be undertaken as decided upon in the field by the Captain in 

 consultation with the scientists concerned. If this canyon terminates well 

 north of the latitude of Ceylon, the east-west lines previously run in the 

 eastern Bay of Bengal shall be continued westward from 88°E to the coast of 

 India. In this event, it might be possible to investigate in detail Krisna, 

 Mahadevon, and Andhra s^lbmarine canyons (17° 54* N, 84° l6'E to 17° Mf'N, 

 84° 02' E) discovered earlier in the HOE. 



Upon reaching the southern termination of the Ganges Canyon or after complet- 

 ing the east- west lines, PIONEER will head for Trincomalee on the northeast 

 coast of Ceylon. N. 0. charts 2523 and 3689 show hard ridges through which 

 has been cut a submarine canyon that heads in Trincomalee and Goddiyar Bays. 

 The canyon has apparently been cut in quartzite and other head Pre-Cambrian 

 rocks and extends seaward to depths of at least 800 fathoms where the existing 

 sounding terminate. 



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