W. P. Hasbrouck served three years in the 

 U. S. Navy prior to attending the Colorado 

 School of Mines where he received a degree 

 in geophysical engineering in 1950. During 

 the summer of 1949 he worked with Mountain 

 Geophysical Company in Wyoming. From 

 1950 to 1953 he was employed by the Stano- 

 lind Oil and Gas Company on various seismo- 

 graph field parties. Since 1953 he has been 

 an instructor and a graduate student in the 

 Department of Geophysical Engineering at 

 the Colorado School of Mines. He is an as- 

 sociate member of the Society of Exploration 

 Geophysicists and a member of the Denver 

 Geophysical Society. 



John D. Haun served four years in the U. S. 

 Coast Guard prior to receiving an A.B. degree 

 in geology from Berea College in 1948. He 

 attended the University of Wyoming where he 

 received an M.A. in 1949 and a Ph.D. in 

 1953. He was employed as a geologist by 

 Stanolind Oil and Gas Company in 1951 and 

 by Petroleum Research Corporation in 1952 

 where he became Vice President in charge of 

 geological research. Since 1955 he has been 

 teaching at the Colorado School of Mines 

 where he is Associate Professor of Geology. 

 He is also a member of the consulting firm of 

 Barlow, Hammond and Haun. He is a mem- 

 ber of the American Association of Petroleum 



Geologists, the Geological Society of America, Sigma Gamma Epsilon, Sigma 

 Xi, and Phi Kappa Phi. 



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