DANIEL S. TUDOR, 69, of Willis and Houston, Texas, died Saturday, November 20, 2000, at Conroe Regional Medical Center. He was born May 14, 1930, in Hammond, Indiana, son of Carlos and Jennie (Strain) Tudor. He attended Indiana University and earned advanced degrees in geophysics including B.S., M.S. and Ph.D. He was a geophysicist at Chevron and achieved the position of President of Chevron Exploration and Production Services (CEPS) before his retirement in 1993. After retirement and until his death, he was active as a consultant in geophysics for several oil exploration companies and served as a member on the board of directors of GSI. He served on the Department of Geological Sciences advisory board at Indiana University. He was active in many related organizations including the European Association of Geoscientists and Engineers, the Geophysical Society of Houston, Sigma Xi (the honors society in science), and the American Association of Petroleum Geologists. He served as Trustee Associate with the Society of Exploration Geophysicists.