Summary of the Seminar on Geophysical Log Analysis and Formation Evaluation, WRD Training Center, Denver, Colorado, January 13-17, 1975. UNITED STATES DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY RESTON, VIRGINIA 22092 November 26, 1975 GROUND WATER BRANCH TECHNICAL MEMORANDUM NO. 76.06 Subject: TRAINING - Summary of the Seminar on Geophysical Log Analysis and Formation Evaluation, WRD Training Center, Denver, Colorado, January 13-17, 1975. The attached summary of selected methods of borehole logging and interpretation was prepared at our request by five participants in the Division's advanced Seminar on Geophysical Log Analysis and Formation Evaluation, January 13-17, 1975. The summary covers recent advances in geophysical log interpretation, digitization and computer analysis and recently developed instrumentation and logging techniques and is distributed for the information of ground-water specialists unable to attend the course offering. Descriptions of some basic computer programs utilized in the analysis of geophysical logs are appended to the Summary. This material was prepared by R. S. Chicko, R. T. Hurr, L. MacCary, R. W. Maclay and W. E. Teasdale. (s) Charles A. Appel for Chief, Ground Water Branch Water Resources Division Enclosure WRD Distribution: A, B, S, FO, PO