From introduction: The maps and tables comprising this report are being transmitted at this time to provide interested users with a summary of the geology of the Ul2e tunnel system. The system was constructed to provide access to underground test sites. This report contains part of the geologic information obtained from investigations conducted by the U. S. Geological Survey to determine the geologic environment of the underground test sites. Results of geophysical and radiometric surveys, and physical properties are being studied. This work was done on behalf of the U. S. Atomic Energy Commission.

Discussing peaceful applications of nuclear explosions