The author has identified the following significant results. The applications of ERTS-1 imagery for geological fracture mapping regardless of season has been repeatedly confirmed. The enhancement provided by a differential cover of snow increases the number and length of fracture-lineaments which can be detected with ERTS-1 data and accelerates the fracture mapping process for a variety of practical applications. The geological mapping benefits of the program will be realized in geographic areas where data are most needed - complex glaciated terrain and areas of deep residual soils. ERTS-1 derived fracture-lineament maps which provide detail well in excess of existing geological maps are not available in the Massachusetts-Connecticut area. The large quantity of new data provided by ERTS-1 may accelerate and improve field mapping now in progress in the area. Numerous other user groups have requested data on the techniques. This represents a major change in operating philosophy for groups who to data judged that snow obscured geological detail. Wobber, F. J. (Principal Investigator) and Martin, K. R. and Amato, R. V. and Leshendok, T. Unspecified Center E74-10080, NASA-CR-135969, ESC-141 NAS5-21744 26969 CONNECTICUT; GEOLOGICAL FAULTS; IMAGE ENHANCEMENT; MASSACHUSETTS; SNOW COVER; STRUCTURAL PROPERTIES (GEOLOGY); EARTH RESOURCES PROGRAM; GEOLOGICAL SURVEYS; MAPPING; TECTONICS <br>