Lineaments on Skylab photographs: detection, mapping and hydrologic significance in central Tennessee

Lineaments were detected on SKYLAB photographs by stereo viewing , projection viewing, and composite viewing. Large well yields of 25 gal/min or more can be obtained in the study area by locating future wells on SKYLAB lineaments rather than on lineaments detected on either high-altitude aerial photographs, LANDSAT images, or by random drilling. Larger savings might be achieved by locating wells on lineaments detected by both stereo viewing and projection. The test site is underlain by dense, fractured, flat-lying limestones. Soil cover averages 4 ft thick in the Central Basin and about 40 ft thick on the Eastern Highland rim. Groundwater occurs mostly in horizontal, sheetlike solution cavities, and the trends of these cavities are controlled by joints. (Lardner-ISWS)